@@ -20,44 +20,51 @@
#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* itoa(int32_t 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 you go
*--p = digit[i%10];
i = i/10;
}while(i);
return b;
int32_t round(double x) {
if (x >= 0)
return (long) (x+0.5);
return (long) (x-0.5);
static __IO uint32_t TimingDelay;
// Move to header file
void init_gpio();
void init_spi();
void process();
void machine();
int main(void)
{
// Init clocks
@@ -109,79 +116,125 @@ int main(void)
// 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);
//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) {
GPIO_SetBits(GPIOB, GPIO_Pin_13);
toggle = ! toggle;
else {
GPIO_ResetBits(GPIOB, GPIO_Pin_13);
GPIO_SetBits(LED_POWER);
Delay(50);
GPIO_ResetBits(LED_POWER);
int32_t temp = 0;
int32_t setpoint = 0;
int32_t p = 1;
int32_t i = 1;
int32_t d = 1;
// Process things
void process()
// Assert CS
GPIO_ResetBits(MAX_CS);
Delay(1);
// This may not clock at all... might need to send 16 bits first
SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
uint16_t retval = SPI_I2S_ReceiveData(SPI2);
uint16_t temp1 = SPI_I2S_ReceiveData(SPI2);
// SPI_I2S_SendData(SPI2, 0xAA); // send dummy data
uint16_t temp2 = 0;//SPI_I2S_ReceiveData(SPI2);
// Deassert CS
GPIO_SetBits(MAX_CS);
int32_t temp = (temp1 << 16) | temp2;
//////////////////////////
// Calc internal temp //
/* temp = temp >> 4; // Drop last 4 bits, no need for them
float internal_temp = temp & 0x7FF // Lower 11bits are internal temp
// Check internal temp sign
if(temp & 0x800) {
// Convert to negative value by extending sign and casting to signed type.
int16_t tmp = 0xF800 | (temp & 0x7FF);
internal_temp = tmp;
internal_temp *= 0.0625; // LSB = 0.0625 degrees
// Now we have a good internal temp!
*/
// Calc external temp //
if(temp & 0x7) {
// Something is wrong...
ssd1306_DrawString("!TempCOMMS", 3, 35);
if(temp & 0x80000000) {
// Negative value, drop the lower 18 bits and explicitly extend sign bits
temp = 0xFFFFC000 | ((temp >> 18) & 0x00003FFFF);
// Positive value, just drop lower 18
temp >>= 18;
double temp_centigrade = temp;
if(temp > 0) {
GPIO_SetBits(LED_STAT);
char tempstr[9];
itoa(retval, tempstr);
itoa(temp, tempstr);
ssd1306_DrawString("Temp: ", 1, 40);
ssd1306_DrawString(tempstr, 1, 70);
/*
if((!retval || (temp & 0x2) != 0))
//return; // Comms error - this is happening right now
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
enum state {
@@ -381,44 +434,47 @@ void TimingDelay_Decrement(void)
if (TimingDelay != 0x00)
TimingDelay--;
void init_spi(void)
SPI_InitTypeDef SPI_InitStructure;
// OLED IC
SPI_Cmd(SPI1, DISABLE);
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_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_Cmd(SPI2, DISABLE);
SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b; // Andysworkshop
SPI_InitStructure.SPI_CPOL = SPI_CPOL_High; // From andysworkshop
SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge; // same
SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low; // From andysworkshop
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // same
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
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);
@@ -483,50 +539,47 @@ void init_gpio(void) {
/*Configure GPIO pin alternate function */
GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);
/** SPI2 GPIO Configuration
PB13 ------> SPI2_SCK
PB14 ------> SPI2_MISO
PB15 ------> SPI2_MOSI
/*Enable or disable the AHB peripheral clock */
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOB, ENABLE);
// SPI PINSSS
/*Configure GPIO pin : PB, MOSI, SCK */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13|GPIO_Pin_15;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStruct.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct);
GPIO_InitTypeDef GPIO_InitStruct2;
// MISO
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_IN;
GPIO_InitStruct2.GPIO_Pin = GPIO_Pin_14;
GPIO_InitStruct2.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStruct2.GPIO_PuPd = GPIO_PuPd_NOPULL;
GPIO_InitStruct2.GPIO_Speed = GPIO_Speed_10MHz;
GPIO_Init(GPIOB, &GPIO_InitStruct2);
//Configure GPIO pin alternate function
GPIO_PinAFConfig(GPIOB, GPIO_PinSource13, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource14, GPIO_AF_SPI2);
GPIO_PinAFConfig(GPIOB, GPIO_PinSource15, GPIO_AF_SPI2);
/** USB GPIO Configuration
PA11 ------> USB_DM
PA12 ------> USB_DP
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
/*Configure GPIO pin : PA */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_11|GPIO_Pin_12;
Status change: