@@ -28,55 +28,48 @@ uint8_t Send_Buffer[64];
uint32_t packet_sent=1;
uint32_t packet_receive=1;
char* itoa(int16_t i, char b[]){
char const digit[] = "0123456789";
char* p = b;
if(i<0){
*p++ = '-';
i *= -1;
}
uint16_t 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
SystemInit();
init_gpio();
// Init USB
//Set_USBClock();
//USB_Interrupts_Config();
//USB_Init();
GPIO_SetBits(LED_POWER);
RCC_ClocksTypeDef RCC_Clocks;
@@ -165,104 +158,66 @@ void process()
else if(temp_pre & 0b0000000000000001) {
ssd1306_DrawString("TC Fault", 3, 35);
else {
ssd1306_DrawString("TempSense OK", 3, 35);
uint8_t sign = temp >> 15;// top bit is sign
temp_pre = temp_pre >> 2; // Drop 2 lowest bits
uint8_t frac = temp_pre & 0b11; // get fractional part
frac *= 25; // each bit is .25 a degree, up to fixed point
temp_pre = temp_pre >> 2; // Drop 2 fractional bits
int16_t temp = 0;
if(sign) {
temp = -temp_pre;
temp = temp_pre;
// Deassert CS
Delay(1);
GPIO_SetBits(MAX_CS);
//////////////////////////
// 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 > 0) {
GPIO_SetBits(LED_STAT);
char tempstr[9];
itoa(temp_pre, tempstr);
ssd1306_DrawString("Temp: ", 1, 40);
ssd1306_DrawString(" ", 1, 70);
ssd1306_DrawString(tempstr, 1, 70);
itoa(frac, tempstr);
ssd1306_DrawString(" ", 1, 90);
ssd1306_DrawString(tempstr, 1, 90);
/*
if((!retval || (temp & 0x2) != 0))
ssd1306_DrawString("!TempCOMMS", 3, 35);
//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 {
STATE_IDLE = 0,
STATE_SETP,
STATE_SETI,
STATE_SETD,
STATE_PREHEAT_BREW,
STATE_MAINTAIN_BREW,
STATE_PREHEAT_STEAM,
STATE_MAINTAIN_STEAM,
};
uint8_t state = STATE_IDLE;
// State machine
void machine()
@@ -456,49 +411,49 @@ void init_spi(void)
// 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_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_Low; // From andysworkshop
SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge; // same
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
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);
// Enable GPIO clocks
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC|RCC_AHBPeriph_GPIOB|RCC_AHBPeriph_GPIOA, ENABLE);
// Enable DMA clocks (Is AHB even the right thing???)
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); // EMZ TODO get the right ones
/*Configure GPIO pin : PC */
GPIO_InitStruct.GPIO_Pin = GPIO_Pin_13;
GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
Status change: