Changeset - d4552b17855a
[Not reviewed]
cortex-f0
0 7 0
matthewreed - 9 years ago 2015-12-23 16:09:55

Resolved all compiler warnings
7 files changed with 34 insertions and 28 deletions:
0 comments (0 inline, 0 general)
display.c
Show inline comments
 
#include "stm32f0xx_hal.h"
 
#include "ssd1306.h"
 
#include "stringhelpers.h"
 
#include "display.h"
 
#include "config.h"
 
#include "states.h"
 
#include "syslib.h"
 
#include "flash.h"
 
#include "gpio.h"
 
#ifdef MAX31865_RTD_SENSOR
 
#include "max31865.h"
 
#endif
 

	
 

	
 
// Private function prototypes
 
static void draw_setpoint(therm_status_t* status);
 

	
 

	
 
// Button transition variables
 
static uint8_t sw_btn_last = 0;
 
static uint8_t sw_up_last = 0;
 
static uint8_t sw_down_last = 0;
 
static uint8_t sw_left_last = 0;
 
static uint8_t sw_right_last = 0;
 

	
 

	
 
// Buttonpress macros
 
#define SW_BTN_PRESSED (sw_btn_last == 0 && sw_btn == 1) // rising edge on buttonpress
 
#define SW_UP_PRESSED (sw_up_last == 0 && sw_up == 1)
 
#define SW_DOWN_PRESSED (sw_down_last == 0 && sw_down == 1)
 
#define SW_LEFT_PRESSED (sw_left_last == 0 && sw_left == 1)
 
#define SW_RIGHT_PRESSED (sw_right_last == 0 && sw_right == 1)
 

	
 

	
 
// States
 
static uint8_t trigger_drawsetpoint = 1;
 
static int16_t last_temp = 21245;
 
static uint8_t goto_mode = MODE_HEAT;
 
static uint8_t reset_mode = RESET_REBOOT;
 

	
 

	
 

	
 
// Display state machine
 
void display_process(therm_settings_t* set, therm_status_t* status)
 
{
 
    uint8_t last_state = status->state;
 
    
 
    uint8_t temp_changed = status->temp != last_temp;
 
    last_temp = status->temp;
 

	
 
    uint8_t sw_btn = !HAL_GPIO_ReadPin(SW_BTN);
 
    uint8_t sw_up = !HAL_GPIO_ReadPin(SW_UP);
 
    uint8_t sw_down = !HAL_GPIO_ReadPin(SW_DOWN);
 
    uint8_t sw_left = !HAL_GPIO_ReadPin(SW_LEFT);
 
    uint8_t sw_right = !HAL_GPIO_ReadPin(SW_RIGHT);
 

	
 
    switch(status->state)
 
    {
 
        // Idle state
 
        case STATE_IDLE:
 
        {
 
@@ -114,331 +104,331 @@ void display_process(therm_settings_t* s
 
					#ifdef BOOTLOADER_SHORTCUT
 
                    case MODE_BOOTLOADER:
 
                        ssd1306_clearscreen();
 
                        ssd1306_drawstring("Bootloader Entered", 0, 0);
 
                        ssd1306_drawstring("Device won't boot", 2, 0);
 
                        ssd1306_drawstring("until reflashed!", 3, 0);
 
                        bootloader_enter(); // Resets into bootloader
 
                        status->state = STATE_RESET; // Just in case
 
                        break;
 
					#endif
 
                    default:
 
                        status->state = STATE_PREHEAT;
 
                }
 
            }
 
            else if(SW_DOWN_PRESSED && goto_mode < (MODE_SIZE - 1)) {
 
                goto_mode++;
 
            }
 
            else if(SW_UP_PRESSED && goto_mode > 0) {
 
                goto_mode--;
 
            }
 

	
 

	
 
            // Event Handler
 
            // N/A
 

	
 
        } break;
 

	
 
        case STATE_SETP:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set p ]
 
            // [ p = 12         ]
 
            ssd1306_drawstring("Proportional", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            char tempstr[6];
 
            itoa(set->val.k_p, tempstr, 10);
 
            ssd1306_drawstring("P=", 1, 45);
 
            ssd1306_drawstring("    ", 1, 57);
 
            ssd1306_drawstring(tempstr, 1, 57);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 
            
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETI;
 
            }
 
            else {
 
                user_input(&set->val.k_p);
 
                user_input((uint16_t*)&set->val.k_p);
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        case STATE_SETI:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set i ]
 
            // [ i = 12         ]
 
            ssd1306_drawstring("Integral", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            char tempstr[6];
 
            itoa(set->val.k_i, tempstr, 10);
 
            ssd1306_drawstring("I=", 1, 45);
 
            ssd1306_drawstring("    ", 1, 57);
 
            ssd1306_drawstring(tempstr, 1, 57);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 
            
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETD;
 
            }
 
            else {
 
                user_input(&set->val.k_i);
 
                user_input((uint16_t*)&set->val.k_i);
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        case STATE_SETD:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set d ]
 
            // [ d = 12         ]
 
            ssd1306_drawstring("Derivative", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            char tempstr[6];
 
            itoa(set->val.k_d, tempstr, 10);
 
            ssd1306_drawstring("D=", 1, 45);
 
            ssd1306_drawstring("    ", 1, 57);
 
            ssd1306_drawstring(tempstr, 1, 57);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETWINDUP;
 
            }
 
            else {
 
                user_input(&set->val.k_d);
 
                user_input((uint16_t*)&set->val.k_d);
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        case STATE_SETWINDUP:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set windup ]
 
            // [ g = 12         ]
 
            ssd1306_drawstring("Windup Guard", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            char tempstr[6];
 
            itoa(set->val.windup_guard, tempstr, 10);
 
            ssd1306_drawstring("G=", 1, 45);
 
            ssd1306_drawstring("    ", 1, 57);
 
            ssd1306_drawstring(tempstr, 1, 57);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETBOOTTOBREW;
 
            }
 
            else {
 
                user_input(&set->val.windup_guard);
 
                user_input((uint16_t*)&set->val.windup_guard);
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        case STATE_SETBOOTTOBREW:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set windup ]
 
            // [ g = 12         ]
 
            ssd1306_drawstring("Start on Boot", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            ssd1306_drawstring("sob=", 1, 45);
 
            
 
            if(set->val.boottobrew)
 
                ssd1306_drawstring("Enabled ", 1, 70);
 
            else
 
                ssd1306_drawstring("Disabled", 1, 70);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETUNITS;
 
            }
 
            else if(!HAL_GPIO_ReadPin(SW_UP)) {
 
                set->val.boottobrew = 1;
 
            }
 
            else if(!HAL_GPIO_ReadPin(SW_DOWN)) {
 
                set->val.boottobrew = 0;
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        case STATE_SETUNITS:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set windup ]
 
            // [ g = 12         ]
 
            ssd1306_drawstring("Units: ", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            if(set->val.temp_units == TEMP_UNITS_FAHRENHEIT)
 
                ssd1306_drawstring("Fahrenheit", 1, 60);
 
            else
 
                ssd1306_drawstring("Celsius   ", 1, 60);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_SETTEMPOFFSET;
 
            }
 
            else if(!HAL_GPIO_ReadPin(SW_UP)) {
 
                set->val.temp_units = TEMP_UNITS_FAHRENHEIT;
 
            }
 
            else if(!HAL_GPIO_ReadPin(SW_DOWN)) {
 
                set->val.temp_units = TEMP_UNITS_CELSIUS;
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 

	
 
        case STATE_SETTEMPOFFSET:
 
        {
 
            // Write text to OLED
 
            // [ therm :: set temp offset ]
 
            // [ g = 12         ]
 
            ssd1306_drawstring("Temp Cal Offset", 0, 40);
 
            ssd1306_drawlogo();
 

	
 
            char tempstr[6];
 
            itoa(set->val.temp_offset, tempstr, 10);
 
            ssd1306_drawstring("O=", 1, 45);
 
            ssd1306_drawstring("    ", 1, 57);
 
            ssd1306_drawstring(tempstr, 1, 57);
 

	
 
            ssd1306_drawstring("Press to accept", 3, 40);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                flash_save(set);
 
                status->state = STATE_IDLE;
 
            }
 
            else {
 
                user_input_signed(&set->val.temp_offset);
 
                user_input_signed((int16_t*)(&set->val.temp_offset));
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 

	
 
        case STATE_PREHEAT:
 
        {
 
            // Write text to OLED
 
            // [ therm : preheating brew ]
 
            // [ 30 => 120 C             ]
 
            ssd1306_drawstring("Preheating...", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint(status);
 

	
 
            status->pid_enabled = 1;
 
	    status->setpoint = set->val.setpoint_brew;
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_IDLE;
 
            }
 
            else {
 
                user_input(&set->val.setpoint_brew);
 
                user_input((uint16_t*)&set->val.setpoint_brew);
 
            }
 

	
 
            // Event Handler
 
            if(status->temp >= status->setpoint) {
 
                status->state = STATE_MAINTAIN;
 
            }
 
 
 
        } break;
 

	
 
        case STATE_MAINTAIN:
 
        {
 
            // Write text to OLED
 
            // [ therm : ready to brew ]
 
            // [ 30 => 120 C           ]
 
            ssd1306_drawstring("Preheated!", 0, 0);
 
            //ssd1306_drawlogo();
 
            draw_setpoint(status);
 
            status->pid_enabled = 1;
 
	    status->setpoint = set->val.setpoint_brew;
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_IDLE;
 
            }
 
            else {
 
                user_input(&set->val.setpoint_brew);
 
                user_input((uint16_t*)&set->val.setpoint_brew);
 
            }
 

	
 
            // Event Handler
 
            // N/A
 
 
 
        } break;
 

	
 
        // Thermocouple error
 
        case STATE_TC_ERROR:
 
        {
 
            // Write text to OLED
 
            // [ therm : ready to steam ]
 
            // [ 30 => 120 C            ]
 
            ssd1306_drawstring("Error:              ", 0, 0);
 

	
 
            char tempstr[6];
 
            itoa(status->error_code, tempstr, 10);
 
            ssd1306_drawstring(tempstr, 0, 57);
 

	
 
            //TODO: add RTD error codes
 

	
 
            if(status->error_code == 1)
 
                ssd1306_drawstring("    TC Open Circuit", 1, 0);
 
            else if(status->error_code == 4)
 
                ssd1306_drawstring("    TC Short to GND", 1, 0);
 
            else if(status->error_code == 8)
 
                ssd1306_drawstring("    TC Short to VCC", 1, 0);
 
            else
 
                ssd1306_drawstring("#?, Unknown Error", 1, 0);
 
            ssd1306_drawstring("                    ", 2, 0);
 

	
 
            ssd1306_drawstring("-> to ignore all or", 2, 0);
 
            ssd1306_drawstring("press to continue", 3, 0);
 

	
 
            // Button handler
 
            if(SW_BTN_PRESSED) {
 
                status->state = STATE_IDLE;
 
				#ifdef MAX31865_RTD_SENSOR
 
				max31865_clear_errors(spi_get());
 
				#endif
 
            }
 
            else if(SW_RIGHT_PRESSED) {
 
                set->val.ignore_error = 1;
 
                status->state = STATE_IDLE;
 
            }
 
            // Event Handler
 
            // Maybe handle if TC is plugged in
 
            // N/A
display.h
Show inline comments
 
#ifndef DISPLAY_H
 
#define DISPLAY_H
 

	
 
#include <stdlib.h>
 
#include "stm32f0xx_hal.h"
 
#include "states.h"
 
#include "ssd1306.h"
 
#include "stringhelpers.h"
 
#include "config.h"
 
#include "states.h"
 
#include "syslib.h"
 
#include "flash.h"
 
#include "gpio.h"
 
#ifdef MAX31865_RTD_SENSOR
 
#include "max31865.h"
 
#endif
 

	
 
void display_process(therm_settings_t* set, therm_status_t* status);
 

	
 
#endif
gpio.c
Show inline comments
 
#include "gpio.h"
 
#include "config.h"
 
#include "stm32f0xx_hal_conf.h"
 
#include <inttypes.h>
 

	
 
// Increase on each press, and increase at a fast rate after duration elapsed of continuously holding down... somehow...
 
static uint32_t change_time_reset = 0;
 

	
 

	
 
// Increment/decrement unsigned variable with up/down buttons
 
void user_input(uint16_t* to_modify)
 
{
 
    if(CHANGE_ELAPSED) {
 
        if(!HAL_GPIO_ReadPin(SW_UP) ) {
 
            CHANGE_RESET;
 
            (*to_modify)++;
 
        }
 
        else if(!HAL_GPIO_ReadPin(SW_DOWN) && (*to_modify) > 0) {
 
            CHANGE_RESET;
 
            (*to_modify)--;
 
        }
 
    }
 
}
 

	
 

	
 
// Increment/decrement signed variable with up/down buttons
 
void user_input_signed(int16_t* to_modify)
 
{
 
    // TODO: Bounds check on int16_t
 
    if(CHANGE_ELAPSED) {
 
        if(!HAL_GPIO_ReadPin(SW_UP) ) {
 
            CHANGE_RESET;
 
            (*to_modify)++;
 
        }
 
        else if(!HAL_GPIO_ReadPin(SW_DOWN)) {
 
            CHANGE_RESET;
 
            (*to_modify)--;
 
        }
 
    }
 
}
 

	
 

	
 
// Initialize GPIO
 
void gpio_init(void)
 
{
 
  GPIO_InitTypeDef GPIO_InitStruct;
 

	
 
    /* GPIO Ports Clock Enable */
 
  __GPIOF_CLK_ENABLE();
 
  __GPIOA_CLK_ENABLE();
 
  __GPIOB_CLK_ENABLE();
 
  __SPI1_CLK_ENABLE();
gpio.h
Show inline comments
 
#ifndef GPIO_H
 
#define GPIO_H
 

	
 
#include <inttypes.h>
 
#include "stm32f0xx_hal.h"
 
#include "stm32f0xx_hal_conf.h"
 
#include "config.h"
 

	
 
#define CHANGE_PERIOD_MS 100
 
#define CHANGE_ELAPSED (HAL_GetTick() - change_time_reset) > CHANGE_PERIOD_MS
 
#define CHANGE_RESET change_time_reset = HAL_GetTick()
 

	
 

	
 
void user_input(uint16_t* to_modify);
 
void user_input_signed(int16_t* to_modify);
 
void gpio_init(void);
 

	
 
#endif
 

	
 
// vim:softtabstop=4 shiftwidth=4 expandtab 
main.c
Show inline comments
 
#include "stm32f0xx_hal.h"
 
 
#include "config.h"
 
#include "syslib.h"
 
#include "pid.h"
 
#include "states.h"
 
#include "ssd1306.h"
 
#ifdef MAX31855_TC_SENSOR
 
#include "max31855.h"
 
#endif
 
#ifdef MAX31865_RTD_SENSOR
 
#include "max31865.h"
 
#endif
 
#include "gpio.h"
 
#include "spi.h"
 
#include "flash.h"
 
#include "stringhelpers.h"
 
#include "display.h"
 
 
#include "usb_device.h"
 
#include "usbd_cdc_if.h"
 
 
therm_settings_t set;
 
therm_status_t status;
 
 
int main(void)
 
{
 
    // Initialize HAL
 
    hal_init();
 
 
    // Configure the system clock
 
    systemclock_init();
 
 
    // Unset bootloader option bytes (if set)
 
    // FIXME this was never getting called. Try again sometime.
 
    //bootloader_unset();
 
 
    // Init GPIO
 
    gpio_init();
 
 
    // Init USB (TODO: Handle plugged/unplugged with external power)
 
    MX_USB_DEVICE_Init();
 
//    set.val.usb_plugged = 
 
 
    // USB startup delay
 
    HAL_Delay(500);
 
    HAL_GPIO_WritePin(LED_POWER, 1);
 
 
    // Enter into bootloader if up button pressed on boot
 
    if(!HAL_GPIO_ReadPin(SW_UP))
 
        bootloader_enter(); 
 
 
    // Init SPI busses
 
    spi_init();
 
    
 
    #ifdef MAX31865_RTD_SENSOR
 
    max31865_config(spi_get());
 
    #endif
 
 
    // Init OLED over SPI
 
    ssd1306_init();
ssd1306.c
Show inline comments
 
@@ -215,152 +215,150 @@ void ssd1306_clearscreen()
 
        for(i = 0; i<128; i++)
 
        {
 
            WriteData(0x00);
 
        }
 
    }
 
    WriteData(0x00);
 
}
 
 
void ssd1306_drawlogo()
 
{
 
    uint8_t i = 0;
 
    setStartPage(3);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
 
        WriteData(row[0][i]);
 
    }
 
 
    WriteData(0x00);
 
 
    setStartPage(2);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
 
        WriteData(row[1][i]);
 
    }
 
    WriteData(0x00);
 
 
    setStartPage(1);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
 
        WriteData(row[2][i]);
 
    }
 
    WriteData(0x00);
 
 
    setStartPage(0);
 
    setStartColumn(0);
 
    for(i = 0; i<32; i++)
 
    {
 
        WriteData(row[3][i]);
 
    }
 
    WriteData(0x00);
 
}
 
 
/* Print a single character from font.cpp */
 
void ssd1306_drawchar(char ascii, unsigned char row, unsigned char xPos)
 
{
 
    char *srcPointer = -1;
 
    unsigned char i;
 
    const char *srcPointer = (char*)-1;
 
 
    srcPointer = &fontData[(ascii-32)][0];
 
 
    setStartPage(row);
 
    setStartColumn(xPos);
 
 
    for(i=0;i<5;i++)
 
    for(uint8_t i = 0; i < 5; i++)
 
    {
 
        WriteData(*srcPointer);
 
        srcPointer++;
 
    }
 
    WriteData(0x00);
 
}
 
 
void ssd1306_drawcharbig(char ascii, unsigned char row, unsigned char xPos)
 
{
 
    char *srcPointer = -1;
 
    unsigned char i;
 
    const char *srcPointer = (char*)-1;
 
 
    srcPointer = &fontData[(ascii-32)][0];
 
 
    setStartPage(row-1);
 
    setStartColumn(xPos);
 
 
    // Write first row
 
    for(i=0;i<5;i++)
 
    for(uint8_t i = 0; i < 5; i++)
 
    {
 
        uint8_t data = 0;
 
        data |= ((*srcPointer) & 0b1000) << 4; // get top 4 bits
 
        data |= ((*srcPointer) & 0b1000) << 3; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b0100) << 3; // get top 4 bits
 
        data |= ((*srcPointer) & 0b0100) << 2; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b0010) << 2; // get top 4 bits
 
        data |= ((*srcPointer) & 0b0010) << 1; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b0001) << 1; // get top 4 bits
 
        data |= ((*srcPointer) & 0b0001); // get top 4 bits
 
 
        WriteData(data);
 
        WriteData(data);
 
 
        srcPointer++;
 
    }
 
    WriteData(0x00);
 
 
    srcPointer -= 5;
 
 
    setStartPage(row);
 
    setStartColumn(xPos);
 
 
    // Write second row
 
    for(i=0;i<5;i++)
 
    for(uint8_t i = 0; i < 5; i++)
 
    {
 
        uint8_t data = 0;
 
        data |=  (*srcPointer) & 0b10000000; // get top 4 bits
 
        data |= ((*srcPointer) & 0b10000000) >> 1; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b01000000) >> 1; // get top 4 bits
 
        data |= ((*srcPointer) & 0b01000000) >> 2; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b00100000) >> 2; // get top 4 bits
 
        data |= ((*srcPointer) & 0b00100000) >> 3; // get top 4 bits
 
 
        data |= ((*srcPointer) & 0b00010000) >> 3; // get top 4 bits
 
        data |= ((*srcPointer) & 0b00010000) >> 4; // get top 4 bits
 
 
        WriteData(data);
 
        WriteData(data);
 
 
        srcPointer++;
 
    }
 
    WriteData(0x00);
 
 
 
}
 
 
void ssd1306_drawstring(const char *dataPtr, unsigned char row, unsigned char xPos)
 
{
 
    char *srcPointer;
 
 
    srcPointer = (char*)dataPtr;
 
    ssd1306_drawchar(' ',row,xPos); // NBSP must be written first before the string start
 
 
    while(1)
 
    {
 
        ssd1306_drawchar(*srcPointer,row,xPos);
 
        srcPointer++;
 
        xPos+=6;
 
        if(*srcPointer == 0) break;
 
    }
 
}
 
 
 
void ssd1306_drawstringbig(const char *dataPtr, unsigned char row, unsigned char xPos)
 
{
 
    char *srcPointer;
 
 
    srcPointer = (char*)dataPtr;
 
    ssd1306_drawcharbig(' ',row,xPos); // NBSP must be written first before the string start
 
 
    while(1)
ssd1306.h
Show inline comments
 
#ifndef   ssd1306_H
 
#define   ssd1306_H
 
 
#define   SSD_RESET       GPIOA,GPIO_PIN_3
 
#define   SSD_A0          GPIOA,GPIO_PIN_4
 
#define   SSD_CS          GPIOA,GPIO_PIN_2
 
 
#define   SSD_Reset_Low()   HAL_GPIO_WritePin(SSD_RESET, 0)
 
#define   SSD_Reset_High()  HAL_GPIO_WritePin(SSD_RESET, 1)
 
#define   SSD_A0_Low()      HAL_GPIO_WritePin(SSD_A0, 0)
 
#define   SSD_A0_High()     HAL_GPIO_WritePin(SSD_A0, 1)
 
#define   SSD_CS_Low()      HAL_GPIO_WritePin(SSD_CS, 0)
 
#define   SSD_CS_High()     HAL_GPIO_WritePin(SSD_CS, 1)
 
 
#include "spi.h"
 
 
// EMZ FIXME this won't really work
 
#define   SPI_SendByte(data)  HAL_SPI_Transmit(spi_get(), &data, 1, 100) 
 
//#define SPI_SendByte(data) 
 
#define SPI_Wait() 
 
 
//#define   SPI_SendByte(data)  SPI_I2S_SendData(SPI1,data) 
 
//#define   SPI_Wait()       while(!(SPI1->SR&SPI_FLAG_TXE));while(SPI1->SR&SPI_FLAG_BSY); 
 
 
#include "stm32f0xx_hal_conf.h"
 
 
void ssd1306_init(void);
 
void ssd1306_drawchar(char ascii, unsigned char row, unsigned char xPos);
 
void ssd1306_drawcharbig(char ascii, unsigned char row, unsigned char xPos);
 
void ssd1306_drawstring(const char *dataPtr, unsigned char row, unsigned char xPos);
 
void ssd1306_drawstringbig(const char *dataPtr, unsigned char row, unsigned char xPos);
 
void ssd1306_drawlogo();
 
void ssd1306_clearscreen();
 
 
#endif
 
 
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