@@ -33,25 +33,25 @@ 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
do{ //Move back, inserting digits as you 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();
@@ -90,33 +90,24 @@ int main(void)
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 = -231;
while(1)
{
temp = SPI_I2S_ReceiveData(SPI2);
//ssd1306_DrawString("Temp: ", 1, 40);
char tempstr[5];
itoa(temp, tempstr);
ssd1306_DrawString("Temp: ", 3, 40);
//char test = temp + 0x30;
//sprintf(tempstr, "%d", test);
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
// TODO: Grab buttonpresses with interrupts
uint8_t sw_btn = GPIO_ReadInputDataBit(SW_BTN);
//uint8_t sw_up = GPIO_ReadInputDataBit(SW_UP);
@@ -141,40 +132,53 @@ int main(void)
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
// Assert CS
GPIO_ResetBits(MAX_CS);
Delay(50);
// This may not clock at all... might need to send 16 bits first
uint8_t retval = 0;//SPI_I2S_ReceiveData(SPI2);
SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
uint16_t retval = SPI_I2S_ReceiveData(SPI2);
char tempstr[9];
itoa(retval, tempstr);
ssd1306_DrawString("Temp: ", 1, 40);
ssd1306_DrawString(tempstr, 1, 70);
// Deassert CS
GPIO_SetBits(MAX_CS);
if((!retval || (temp & 0x2) != 0))
return; // Comms error - this is happening right now
ssd1306_DrawString("!TempCOMMS", 3, 35);
//return; // Comms error - this is happening right now
if((temp & 0x4)!= 0)
return; // Open thermocouple
else if((temp & 0x4)!= 0)
ssd1306_DrawString("!OpenThermocouple", 3, 40);
//return; // Open thermocouple
temp = (temp & 0x7FF8) >> 5;
// TODO: Add calibration offset (linear)
// Perform PID calculations
// Write output to SSR
@@ -383,40 +387,40 @@ void TimingDelay_Decrement(void)
void init_spi(void)
SPI_InitTypeDef SPI_InitStructure;
// OLED IC
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Tx;
SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_Init(SPI1, &SPI_InitStructure);
SPI_Cmd(SPI1, ENABLE); /* Enable the SPI */
// MAX IC
//SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx;
SPI_InitStructure.SPI_Direction = SPI_Direction_1Line_Rx;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b; // Andysworkshop
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // From andysworkshop
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // same
// Can be used for CS... SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
//SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
//SPI_InitStructure.SPI_CRCPolynomial = 7;
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; // From andysworkshop
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; // same
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
SPI_Init(SPI2, &SPI_InitStructure);
SPI_Cmd(SPI2, ENABLE); /* Enable the SPI */
void init_gpio(void) {
GPIO_InitTypeDef GPIO_InitStruct;
// Enable SPI clocks
RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
@@ -516,43 +520,19 @@ void init_gpio(void) {
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
/** USB GPIO Configuration
PA11 ------> USB_DM
PA12 ------> USB_DP
*/
/*Enable or disable the AHB peripheral clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/*Configure GPIO pin : PA */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_11|GPIO_Pin_12;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_400KHz;
GPIO_Init(GPIOA, &GPIO_InitStruct);
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
void assert_failed(uint8_t* file, uint32_t line)
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{}
#endif
// vim:softtabstop=4 shiftwidth=4 expandtab
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