@@ -66,31 +66,31 @@ int main(void)
// TODO: PWM of stat led (TIM3_CH2)
// Configure 1ms SysTick (change if more temporal resolution needed)
RCC_ClocksTypeDef RCC_Clocks;
RCC_GetClocksFreq(&RCC_Clocks);
SysTick_Config(RCC_Clocks.HCLK_Frequency / 1000);
// Init SPI busses
init_spi();
// Init OLED over SPI
ssd1306_Init();
ssd1306_block_write();
ssd1306_clearscreen();
// Startup screen
ssd1306_DrawString("therm v0.1", 1, 40);
ssd1306_DrawString("protofusion.org/therm", 3, 0);
delay(1500);
// Main loop
while(1)
{
// Process sensor inputs
process();
// Run state machine
machine();
}
@@ -457,25 +457,25 @@ void machine()
// Something is terribly wrong
default:
state = STATE_IDLE;
} break;
if(last_state != state) {
// Clear screen on state change
// Delay a number of systicks
void delay(__IO uint32_t nTime)
TimingDelay = nTime;
while(TimingDelay != 0);
// ISR-triggered decrement of delay and increment of tickcounter
/*******************************************************************************
* File Name : ssd1306.c
* Author : lxyppc
* Version : V1.0
* Date : 10-01-21
* Description : ssd1306 operations
* the SSH1101A is compatible with ssd1306
*******************************************************************************/
/* Includes ------------------------------------------------------------------*/
#include "stm32l100c_discovery.h"
#include "bsp.h"
#include "ssd1306.h"
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
#define SSD1306_PAGE_NUMBER 8
#define SSD1306_COLUMN_NUMBER 128
#define SSD1306_COLUMN_MARGIN_START 2
#define SSD1306_COLUMN_MARGIN_END 2
#define SSD1306_X_PIXEL 128
#define SSD1306_Y_PIXEL 32
/* Private macro -------------------------------------------------------------*/
#define ssd1306_Buffer (_SSD1306_Buffer + SSD1306_COLUMN_MARGIN_START)
/* Private variables ---------------------------------------------------------*/
static uint8_t _SSD1306_Buffer[SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER + SSD1306_COLUMN_MARGIN_START + SSD1306_COLUMN_MARGIN_END] = {0};
static uint8_t pageIndex = 0;
static uint8_t iS_SSD_On = 0;
static uint8_t pre_on = 0;
static uint8_t curContrast = 0xCC;
static uint8_t lastContrast = 0xCC;
/* Private function prototypes -----------------------------------------------*/
void WriteCommand(unsigned char command);
void WriteData(unsigned char data);
void OnPageTransferDone(void);
unsigned long ssd1306_OFF(void);
unsigned long ssd1306_ON(void);
unsigned char* ssd1306_GetBuffer()
return ssd1306_Buffer;
* Function Name : WriteCommand
* Description : Write command to the ssd1306
* Input : None
* Output : None
* Return : None
// Write command to OLED
void WriteCommand(unsigned char command)
SSD_A0_Low();
SPI_SendByte(command);
SPI_Wait();
* Function Name : WriteData
* Description : Write data to the ssd1306
// Write data to OLED
void WriteData(unsigned char data)
SSD_A0_High();
SPI_SendByte(data);
* Function Name : ssd1306_Init
* Description : Initialize the ssd1306
// Initialize OLED
void ssd1306_Init(void)
/* Generate a reset */
SSD_Reset_Low();
uint32_t i;
for(i=5000; i>1; i--)
SSD_Reset_High();
WriteCommand(0xAE);
WriteCommand(0xD5);
WriteCommand(0x80);
@@ -105,413 +47,24 @@ void ssd1306_Init(void)
WriteCommand(0x81); // contrast
WriteCommand(0x0F); // contrast value. 8f is a good one.
WriteCommand(0xD9);
WriteCommand(0xF1); //22 or F1 if not externalvcc
WriteCommand(0xDB);
WriteCommand(0x40);
WriteCommand(0xA4); // dispalyallon_resume
WriteCommand(0xA6); // normaldisplay
WriteCommand(0xAF); // display on
void ssd1306_block_write(void)
// Set col start addr to 0
WriteCommand(0x21);
WriteCommand(0x00);
// Set col end addr to width - 1
WriteCommand(127);
// Set page addr
WriteCommand(0x22);
WriteCommand(0x00); // start page addr
WriteCommand(4); // end page addr (height / 8)
// Write data
uint32_t i = 0;
for(i=0;i<512;i++)
WriteData(ssd1306_Buffer[i]);
* Function Name : ssd1306_TurnOff
* Description : Turn off the ssd1306 controller
unsigned long ssd1306_TurnOff(void)
pre_on = 0;
return iS_SSD_On;
* Function Name : ssd1306_TurnOn
unsigned long ssd1306_TurnOn(void)
pre_on = 1;
* Function Name : ssd1306_SetContrast
* Description : Set the ssd1306 contrast
unsigned char ssd1306_SetContrast(unsigned char contrast)
curContrast = contrast;
return lastContrast;
* Function Name : ssd1306_GetContrast
* Description : Get the ssd1306 contrast
unsigned char ssd1306_GetContrast()
* Function Name : ssd1306_OFF
unsigned long ssd1306_OFF(void)
if(iS_SSD_On){
#ifdef DEBUG_UI
for(i=0;i<ssd1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER;i++){
ssd1306_Buffer[i] = 0;
#else
// Turn off the display
WriteCommand(0xae);
// Set Charge pump
WriteCommand(0x8D); /* Set Charge pump */
WriteCommand(0x10); /* 0x14=ON, 0x10=Off */
#endif
iS_SSD_On = 0;
* Function Name : ssd1306_ON
* Description : Turn on the ssd1306 controller
unsigned long ssd1306_ON(void)
if(!iS_SSD_On){
#ifdef DEBUG_BOARD
WriteCommand(0x14); /* 0x14=ON, 0x10=Off */
// Turn on the display
WriteCommand(0xaf);
iS_SSD_On = 1;
* Function Name : ssd1306_IsOn
* Description : Check whether the ssd1306 is on or off
unsigned long ssd1306_IsOn(void)
* Function Name : OnPageTransferDone
* Description : Called when each page transfer done
void OnPageTransferDone(void)
if(pageIndex == SSD1306_PAGE_NUMBER){
pageIndex = 0;
return;
WriteCommand(0xb0 + pageIndex);
if(pageIndex == 0){
WriteCommand(0x10);
DMA1_Channel5->CCR &= ((uint32_t)0xFFFFFFFE);
DMA1_Channel5->CNDTR = ssd1306_COLUMN_NUMBER+SSD1306_COLUMN_MARGIN_START + SSD1306_COLUMN_MARGIN_END;
DMA1_Channel5->CMAR = (uint32_t)(ssd1306_Buffer+SSD1306_COLUMN_NUMBER*pageIndex - SSD1306_COLUMN_MARGIN_START);
DMA_SSD_1306->CCR |= ((uint32_t)0x00000001);
pageIndex++;
DMA_SSD_1306->CCR &= ((uint32_t)0xFFFFFFFE);
DMA_SSD_1306->CNDTR = SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER;//+SSD1306_COLUMN_MARGIN_START + SSD1306_COLUMN_MARGIN_END;
DMA_SSD_1306->CMAR = (uint32_t)(ssd1306_Buffer);//+SSD1306_COLUMN_NUMBER*pageIndex);
//DMA_Cmd(DMA_SSD_1306, ENABLE);
// pageIndex++;
pageIndex = SSD1306_PAGE_NUMBER;
* Function Name : DMA1_Channel5_IRQHandler
* Description : This function handles DMA1 Channel 5 interrupt request.
void DMA_Handler_SSD_1306(void) //DMA1_Channel5_IRQHandler(void)
if(DMA_GetITStatus(DMA1_IT_TC5)){
DMA_ClearITPendingBit(DMA1_IT_GL5);
OnPageTransferDone();
* Function Name : StartPageTransfer
* Description : Start a new page transfer
void StartPageTransfer(void)
if(pre_on){
if(iS_SSD_On == 0){
pre_on = ssd1306_ON();
}else{
pre_on = ssd1306_OFF();
if( curContrast != lastContrast ){
lastContrast = curContrast;
WriteCommand(0x81); /* Set Contrast Control */
WriteCommand(lastContrast); /* 0 ~ 255 0x1f*/
Display related functions
******************************************************************************/
* Function Name : ssd1306_DrawBlock
* Description : Draw a block with specify data to ssd1306
unsigned long ssd1306_DrawBlock(
Pos_t x,
Pos_t y,
Pos_t cx,
Pos_t cy,
const unsigned char* data)
if(x >= SSD1306_X_PIXEL)return 0;
if(y >= SSD1306_Y_PIXEL)return 0;
if(x+cx > SSD1306_X_PIXEL ) cx = SSD1306_X_PIXEL - x ;
if(y+cy > SSD1306_Y_PIXEL ) cy = SSD1306_Y_PIXEL - y ;
unsigned char* pStart = ssd1306_Buffer + (y/8)*SSD1306_COLUMN_NUMBER + x;
unsigned char offset1 = y%8;
unsigned char offset2 = (cy+y)%8;
if(data){
unsigned char mask1 = (1<<offset1)-1;
unsigned char mask2 = ~((1<<offset2)-1);
cy = (cy+offset1)/8;
Pos_t i = 0;
for(i=0;i<cx;i++){
Pos_t j = 0;
unsigned short tmp = *pStart & mask1;
for(;j<cy;j++){
tmp |= (((unsigned short)data[j*cx])<<offset1);
*(pStart + j*SSD1306_COLUMN_NUMBER) = tmp;
tmp>>=8;
if(offset2){
tmp |= ((((unsigned short)data[j*cx])<<offset1) & (~mask2))
| *(pStart + j*SSD1306_COLUMN_NUMBER) & mask2;
data++;
pStart++;
unsigned char mask1 = ~((1<<offset1)-1);
unsigned char mask2 = ((1<<offset2)-1);
Pos_t j = 1;
*pStart ^= mask1;
*(pStart + j*SSD1306_COLUMN_NUMBER) ^= 0xFF;
*(pStart + j*SSD1306_COLUMN_NUMBER) ^= mask2;
// if(!offset){
// for(Pos_t i=0;i<cx;i++){
// unsigned char tmp;
// Pos_t j = 0;
// for(;j<cy/8;j++){
// tmp = data[i+j*cx];
// *(pStart + j*ssd1306_COLUMN_NUMBER + i + x) = tmp;
// }
// if(cy&0x7){
// unsigned char mask1 = (1<<(cy&7)) - 1;
// unsigned char mask2 = 0xFF - mask1;
// tmp = (data[i+j*cx] & mask1)
// | (*(pStart + j*ssd1306_COLUMN_NUMBER + i + x) & mask2);
// }else{
// unsigned short tmp;
// for(Pos_t j=0;j<cy/8;j++){
// if(j == 0){
// // First line
// tmp = *(pStart + j*ssd1306_COLUMN_NUMBER + i + x) & mask;
// tmp |= (((unsigned short)data[i+j*cx])<<offset);
// tmp>>=8;
// if(j == (cy/8)-1){
// // Last line
// *(pStart + (j+1)*ssd1306_COLUMN_NUMBER + i + x) &= ~mask;
// *(pStart + (j+1)*ssd1306_COLUMN_NUMBER + i + x) |= tmp;
return 0;
* Function Name : ssd1306_DrawPoint
* Description : Draw a point with specify data to ssd1306
unsigned long ssd1306_DrawPoint(
Color_t color)
unsigned char mask = 1<<(y%8);
if(color){
*pStart |= mask;
*pStart &= ~mask;
* Function Name : ssd1306_ReadPoint
* Description : Read a point from ssd1306
unsigned long ssd1306_ReadPoint(
Pos_t y)
return *pStart&mask ? 1 : 0;
* Function Name : ssd1306_ClearScreen
* Description : Clear the screen contents
void ssd1306_FillScreen(Color_t color)
unsigned char mask = color ? 0xFF : 0;
unsigned long i = 0;
for(i=0;i<SSD1306_COLUMN_NUMBER*SSD1306_PAGE_NUMBER;i++){
ssd1306_Buffer[i] = mask;
const DeviceProp ssd1306_Prop =
.pfnDrawBlok = ssd1306_DrawBlock,
.pfnDrawPoint = ssd1306_DrawPoint,
.xPixel = 128,
.yPixel = 64,
};
// Times New Roman font
const char fontData[240][5] =
{ // Refer to "Times New Roman" Font Database
// Basic Characters
{0x00,0x00,0x00,0x00,0x00}, // ( 0) - 0x0020 No-Break Space
{0x00,0x00,0x4F,0x00,0x00}, // ( 1) ! - 0x0021 Exclamation Mark
{0x00,0x07,0x00,0x07,0x00}, // ( 2) " - 0x0022 Quotation Mark
{0x14,0x7F,0x14,0x7F,0x14}, // ( 3) # - 0x0023 Number Sign
{0x24,0x2A,0x7F,0x2A,0x12}, // ( 4) $ - 0x0024 Dollar Sign
{0x23,0x13,0x08,0x64,0x62}, // ( 5) % - 0x0025 Percent Sign
{0x36,0x49,0x55,0x22,0x50}, // ( 6) & - 0x0026 Ampersand
@@ -629,38 +182,50 @@ void setStartPage(unsigned char d)
/* Below are functions used to configure the OLED */
void setStartColumn(unsigned char d)
WriteCommand(0x00+d%16); // Set Lower Column Start Address for Page Addressing Mode
WriteCommand(0x10+d/16); // Set Higher Column Start Address for Page Addressing Mode
// Default => 0x10
const uint8_t row[4][32] = {
{0x00,0x00,0x01,0x03,0x07,0x0F,0x1E,0x3C,0x3C,0x7C,0x7C,0x7C,0xFC,0xFF,0xFF,0xFC,0xFC,0xFC,0xFC,0xFF,0x7F,0x7F,0x7F,0x3C,0x3C,0x1C,0x0C,0x06,0x03,0x01,0x00,0x00},
{0x0F,0x7F,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x3F,0x3F,0x7F,0xFF,0xFF,0x00,0x00,0x00,0x00,0xFF,0xFF,0xFF,0xFF,0x00,0x00,0x00,0x00,0x00,0xFF,0xFF,0x7F,0x0F},
{0xF0,0xFE,0xFF,0xFF,0xFF,0xC7,0x00,0x00,0x00,0x00,0x87,0xC7,0xC7,0xFF,0xFF,0x00,0x00,0x00,0x00,0x87,0x87,0xC7,0xC3,0x03,0x07,0x07,0x0F,0x7F,0xFF,0xFF,0xFE,0xF0},
{0x00,0x00,0x80,0xC0,0xE0,0xF0,0xF8,0xFC,0xFC,0xFE,0xFE,0xFE,0xFF,0xFF,0xFF,0x1F,0x1F,0x1F,0x1F,0xFF,0xFE,0xFE,0xFE,0xFC,0xFC,0xF8,0xF0,0xE0,0xC0,0x80,0x00,0x00},
void ssd1306_clearscreen()
uint8_t i = 0;
uint8_t page = 0;
for(page = 0; page<4; page++)
setStartPage(page);
setStartColumn(0);
for(i = 0; i<128; i++)
WriteData(0x00);
void ssd1306_drawlogo()
setStartPage(3);
for(i = 0; i<32; i++)
WriteData(row[0][i]);
#ifndef ssd1306_H
#define ssd1306_H
typedef unsigned long Pos_t;
typedef unsigned long Size_t;
typedef unsigned long Color_t;
typedef unsigned long (*pfnDrawBlock_t)(
const unsigned char* data);
typedef unsigned long (*pfnDrawPoint_t)(Pos_t x, Pos_t y, Color_t color);
typedef unsigned long(*pfnFontDrawChar)(pfnDrawBlock_t DrawBlock,Pos_t x, Pos_t y, unsigned int ch);
typedef struct _DeviceProp
pfnDrawBlock_t pfnDrawBlok;
pfnDrawPoint_t pfnDrawPoint;
Size_t xPixel;
Size_t yPixel;
}DeviceProp;
typedef struct _Device
const DeviceProp* pDevProp;
pfnFontDrawChar pfnFont;
Pos_t curX;
Pos_t curY;
}Device;
void ssd1306_Init(void);
void StartPageTransfer(void);
extern const DeviceProp ssd1306_Prop;
unsigned long ssd1306_DrawBlock(Pos_t x, Pos_t y, Pos_t cx, Pos_t cy, const unsigned char* data);
unsigned long ssd1306_IsOn(void);
unsigned long ssd1306_TurnOff(void);
unsigned long ssd1306_TurnOn(void);
unsigned char ssd1306_SetContrast(unsigned char contrast);
unsigned char ssd1306_GetContrast();
unsigned char* ssd1306_GetBuffer();
unsigned long ssd1306_DrawPoint(Pos_t x, Pos_t y, Color_t color);
void ssd1306_block_write(void);
void ssd1306_DrawChar(char ascii, unsigned char row, unsigned char xPos);
void ssd1306_DrawString(const char *dataPtr, unsigned char row, unsigned char xPos);
void ssd1306_drawlogo();
void ssd1306_clearscreen();
Status change: