#include "main.h"
#include "stm32l100c_discovery.h"
#include "ssd1306.h"
// USB includes
#include "hw_config.h"
#include "usb_lib.h"
#include "usb_desc.h"
#include "usb_pwr.h"
#define LED_POWER GPIOB,GPIO_Pin_9
#define LED_STAT GPIOA,GPIO_Pin_15
#define MAX_CS GPIOB,GPIO_Pin_12
// TODO: Grab buttonpresses with interrupts
#define SW_BTN GPIOB, GPIO_Pin_3
#define SW_UP GPIOB, GPIO_Pin_7
#define SW_DOWN GPIOB, GPIO_Pin_6
#define SW_LEFT GPIOB, GPIO_Pin_5
#define SW_RIGHT GPIOB, GPIO_Pin_4
// USB Supporting Vars
extern __IO uint8_t Receive_Buffer[64];
extern __IO uint32_t Receive_length ;
extern __IO uint32_t length ;
uint8_t Send_Buffer[64];
uint32_t packet_sent=1;
uint32_t packet_receive=1;
char* itoa(int i, char b[]){
char const digit[] = "0123456789";
char* p = b;
if(i<0){
*p++ = '-';
i *= -1;
}
int shifter = i;
do{ //Move to where representation ends
++p;
shifter = shifter/10;
}while(shifter);
*p = '\0';
do{ //Move back, inserting digits as u go
*--p = digit[i%10];
i = i/10;
}while(i);
return b;
static __IO uint32_t TimingDelay;
// Move to header file
void init_gpio();
void init_spi();
void process();
void machine();
int main(void)
{
// Init clocks
SystemInit();
init_gpio();
// Init USB
//Set_USBClock();
//USB_Interrupts_Config();
//USB_Init();
GPIO_SetBits(LED_POWER);
RCC_ClocksTypeDef RCC_Clocks;
// SysTick end of count event each 1ms
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
GPIO_ResetBits(LED_STAT);
Delay(100);
Delay(500);
GPIO_ResetBits(LED_POWER);
init_spi();
ssd1306_Init();
ssd1306_block_write();
ssd1306_DrawString("therm 0.1", 0, 40);
ssd1306_DrawString("Status: Idle", 2, 40);
// ssd1306_block_write();
ssd1306_test();
uint8_t toggle = 0;
int16_t temp = 0;
int16_t temp = -231;
while(1)
temp = SPI_I2S_ReceiveData(SPI2);
ssd1306_DrawString("Temp: ", 1, 40);
//ssd1306_DrawString("Temp: ", 1, 40);
char tempstr[5];
char test = temp + 0x30;
itoa(temp, tempstr);
ssd1306_DrawString("Temp: ", 3, 40);
//char test = temp + 0x30;
//sprintf(tempstr, "%d", test);
//ssd1306_DrawString(tempstr, 1, 70);
ssd1306_DrawString(tempstr, 3, 70);
//ssd1306_block_write();
// Process sensor inputs [TODO: 5hz?]
process();
// Run state machine [TODO: 50hz?]
machine();
// probably just passed the actual port
uint8_t sw_btn = GPIO_ReadInputDataBit(SW_BTN);
uint8_t sw_up = GPIO_ReadInputDataBit(SW_UP);
uint8_t sw_down = GPIO_ReadInputDataBit(SW_DOWN);
uint8_t sw_left = GPIO_ReadInputDataBit(SW_LEFT);
uint8_t sw_right = GPIO_ReadInputDataBit(SW_RIGHT);
//uint8_t sw_up = GPIO_ReadInputDataBit(SW_UP);
//uint8_t sw_down = GPIO_ReadInputDataBit(SW_DOWN);
//uint8_t sw_left = GPIO_ReadInputDataBit(SW_LEFT);
//uint8_t sw_right = GPIO_ReadInputDataBit(SW_RIGHT);
if(!sw_btn) {
GPIO_ToggleBits(LED_STAT);
if(!toggle) {
ssd1306_DrawString("________________", 3, 32);
toggle = ! toggle;
else {
ssd1306_DrawString("----------------", 3, 32);
Delay(50);
int32_t temp = 0;
int32_t setpoint = 0;
int32_t p = 1;
int32_t i = 1;
int32_t d = 1;
// Process things
void process()
// Read MAX temp sensor
GPIO_ResetBits(MAX_CS);
// Assert CS
// This may not clock at all... might need to send 16 bits first
uint8_t retval = 0;//SPI_I2S_ReceiveData(SPI2);
// Deassert CS
GPIO_SetBits(MAX_CS);
if((!retval || (temp & 0x2) != 0))
return; // Comms error - this is happening right now
if((temp & 0x4)!= 0)
return; // Open thermocouple
temp = (temp & 0x7FF8) >> 5;
// TODO: Add calibration offset (linear)
// Perform PID calculations
// Write output to SSR
Status change: