@@ -31,98 +31,109 @@ uint32_t packet_receive=1;
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;
while(1)
temp = SPI_I2S_ReceiveData(SPI2);
ssd1306_DrawString("Temp: ", 1, 40);
char tempstr[5];
char test = temp + 0x30;
//sprintf(tempstr, "%d", test);
//ssd1306_DrawString(tempstr, 1, 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);
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
@@ -133,228 +144,237 @@ void process()
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
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()
switch(state)
// Idle state
case STATE_IDLE:
// Write text to OLED
// [ therm :: idle ]
ssd1306_DrawString("therm :: idle ", 0, 40);
// Button handler
if(GPIO_ReadInputDataBit(SW_BTN)) {
if(!GPIO_ReadInputDataBit(SW_BTN)) {
state = STATE_SETP;
// Event Handler
// N/A
} break;
case STATE_SETP:
// [ therm :: set p ]
// [ p = 12 ]
ssd1306_DrawString("therm :: set p", 0, 40);
state = STATE_IDLE;
state = STATE_SETI;
case STATE_SETI:
// [ therm :: set i ]
// [ i = 12 ]
ssd1306_DrawString("therm :: set i", 0, 40);
state = STATE_SETD;
case STATE_SETD:
// [ therm :: set d ]
// [ d = 12 ]
ssd1306_DrawString("therm :: set d", 0, 40);
case STATE_PREHEAT_BREW:
// [ therm : preheating brew ]
// [ 30 => 120 C ]
ssd1306_DrawString("therm :: Bpreheat", 0, 40);
if(temp >= setpoint) {
state = STATE_MAINTAIN_BREW;
case STATE_MAINTAIN_BREW:
// [ therm : ready to brew ]
ssd1306_DrawString("therm :: Bready", 0, 40);
case STATE_PREHEAT_STEAM:
// [ therm : preheating steam ]
ssd1306_DrawString("therm :: Spreheat", 0, 40);
state = STATE_MAINTAIN_STEAM;
case STATE_MAINTAIN_STEAM:
// [ therm : ready to steam ]
ssd1306_DrawString("therm :: Sready", 0, 40);
// Something is terribly wrong
default:
ssd1306_DrawString("therm :: BAD BAD", 0, 40);
/**
* @brief Inserts a delay time.
* @param nTime: specifies the delay time length, in 1 ms.
* @retval None
*/
void Delay(__IO uint32_t nTime)
TimingDelay = nTime;
while(TimingDelay != 0);
* @brief Decrements the TimingDelay variable.
* @param None
void TimingDelay_Decrement(void)
if (TimingDelay != 0x00)
TimingDelay--;
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_FirstBit = SPI_FirstBit_MSB;
SPI_InitStructure.SPI_CRCPolynomial = 7;
Status change: