int main(void)
{
UART_Init();
UART_SendStr("\nSTM32F103RET6 is online.\n");
UART_SendStr("I2C init ... ");
if (!LM75_Init(100000)) UART_SendStr("ready.\n"); else {
UART_SendStr("fail.\n");
UART_SendStr("MCU halted now.\n");
while(1);
}
uint16_t value;
value = LM75_ReadReg(0x00);
UART_SendHex16(value); UART_SendChar('\n');
value = LM75_ReadConf();
UART_SendHex8(value); UART_SendChar('\n');
value = LM75_ReadReg(0x02);
UART_SendHex16(value); UART_SendChar('\n');
value = LM75_ReadReg(0x03);
UART_SendHex16(value); UART_SendChar('\n');
LM75_Shutdown(DISABLE);
int16_t temp = LM75_Temperature();
UART_SendInt(temp / 10); UART_SendChar('.');
temp %= 10;
if (temp < 0) temp *= -1;
UART_SendInt(temp % 10); UART_SendStr("C\n");
while(1);
}
/**
* Initialize the I2C
*/
void InitI2C()
{
//I2C Pin Config
mPORTBSetPinsDigitalOut(I2C_SCL_Pin | I2C_SDA_Pin);
I2CEnable(I2C1, FALSE);
//Soft reset I2C Bus by pulsing the clock line 10 times
mPORTBSetBits(I2C_SCL_Pin | I2C_SDA_Pin);
unsigned int i;
unsigned int wait;
for (i = 0; i < 20; i++) {
for (wait = 0; wait < 20; wait++);
mPORTBToggleBits(I2C_SCL_Pin);
}
mPORTBSetBits(I2C_SCL_Pin | I2C_SDA_Pin);
// Configure Various I2C Options
//!!!!! - Slew rate control off(High speed mode enabled), If enabled, RA0 and RA1 fail to work, see silicon errata (Microchip Hardware Bugs)
I2CConfigure(I2C1, I2C_ENABLE_SLAVE_CLOCK_STRETCHING | I2C_ENABLE_HIGH_SPEED);
// Set the I2C baud rate
int I2C_actualClock = I2CSetFrequency(I2C1, SYS_FREQ, I2C_Clock);
UART_SendString("I2C Clock: ");
UART_SendInt(I2C_actualClock);
UART_SendString(" Hz\n\r");
// Enable the I2C bus
I2CEnable(I2C1, TRUE);
while (!I2CTransmitterIsReady(I2C1));
// configure the interrupt priority for the I2C peripheral
//INTSetVectorPriority(INT_I2C_1_VECTOR,INT_PRIORITY_LEVEL_3);
//INTClearFlag(INT_I2C1);
//INTEnable(INT_I2C1,INT_ENABLED);
}
void EXTI9_5_IRQHandler(void) {
if (EXTI->PR & INT1_EXTI_LINE) {
i8 = BMC050_ACC_GetTSIRQ(); // Get IRQ source
BMC050_ACC_GetXYZ(&X,&Y,&Z); // Get last accelerometer readings
BMC050_ACC_SetIRQMode(ACC_IM_RESET); // Reset all latched interrupts
UART_SendStr(USART2,"Slope=");
UART_SendHex8(USART2,i8);
UART_SendChar(USART2,' ');
if (i8 & ACC_TS_SLOPEZ) UART_SendStr(USART2,"SLOPEZ ");
if (i8 & ACC_TS_SLOPEY) UART_SendStr(USART2,"SLOPEY ");
if (i8 & ACC_TS_SLOPEX) UART_SendStr(USART2,"SLOPEX ");
UART_SendStr(USART2," X=");
UART_SendInt(USART2,X);
UART_SendStr(USART2," Y=");
UART_SendInt(USART2,Y);
UART_SendStr(USART2," Z=");
UART_SendInt(USART2,Z);
UART_SendChar(USART2,'\n');
EXTI->PR = INT1_EXTI_LINE; // Clear IT bit for EXTI line
}
}
int main(void) {
Delay_Init((void *)0);
UARTx_Init(USART2,1382400);
UART_SendStr(USART2,"--------------------------------------\n");
if (I2Cx_Init(BMC050_I2C_PORT,400000) != I2C_SUCCESS) {
UART_SendStr(USART2,"I2C2 init fail\n");
while(1);
}
UART_SendStr(USART2,"I2C2 init at 400kHz\n");
// Enable PORTA peripheral
RCC->AHBENR |= RCC_AHBENR_GPIOAEN;
// Configure PA6 as external interrupt
GPIOA->MODER &= ~GPIO_MODER_MODER6; // Input mode (reset state)
GPIOA->PUPDR &= ~GPIO_PUPDR_PUPDR6; // No pull-up, pull-down
GPIOA->PUPDR |= GPIO_PUPDR_PUPDR6_1; // Pull-down
// Configure priority group: 4 bits for preemption priority, 0 bits for subpriority.
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_4);
// Enable the SYSCFG module clock
RCC->APB2ENR |= RCC_APB2ENR_SYSCFGEN;
// PA6 -> EXTI line 6 (INT1 from BMC050)
EXTI->PR = INT1_EXTI_LINE; // Clear IT pending bit for EXTI line
EXTI->IMR |= INT1_EXTI_LINE; // Enable interrupt request from EXTI line
EXTI->EMR &= ~INT1_EXTI_LINE; // Disable event on EXTI line
EXTI->RTSR |= INT1_EXTI_LINE; // Trigger rising edge enabled
EXTI->FTSR &= ~INT1_EXTI_LINE; // Trigger falling edge disabled
// Enable the USB interrupt
NVICInit.NVIC_IRQChannel = EXTI9_5_IRQn;
NVICInit.NVIC_IRQChannelPreemptionPriority = 2;
NVICInit.NVIC_IRQChannelSubPriority = 0;
NVICInit.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVICInit);
///*
uint8_t buf[2];
uint8_t reg;
uint8_t val;
uint32_t i;
//*/
///*
reg = 0x00;
val = 0;
UART_SendStr(USART2,"\nAccelerometer\n");
for (reg = 0; reg <= 0x3f; reg++) {
I2Cx_Write(BMC050_I2C_PORT,®,1,0x18 << 1,I2C_NOSTOP);
I2Cx_Read(BMC050_I2C_PORT,&val,1,0x18 << 1);
UART_SendStr(USART2,"R");
UART_SendHex8(USART2,reg);
UART_SendStr(USART2," = ");
UART_SendHex8(USART2,val);
UART_SendStr(USART2,"\t\t");
}
UART_SendChar(USART2,'\n');
//*/
/*
UART_SendStr(USART2,"\nMagnetometer\n");
// Magnetometer power enable
buf[0] = 0x4b;
buf[1] = 0x01; // Set power control bit
I2Cx_Write(BMC050_I2C_PORT,&buf[0],2,0x10 << 1,I2C_STOP);
for (reg = 0x40; reg <= 0x52; reg++) {
I2Cx_Write(BMC050_I2C_PORT,®,1,0x10 << 1,I2C_NOSTOP);
I2Cx_Read(BMC050_I2C_PORT,&val,1,0x10 << 1);
UART_SendStr(USART2,"R");
UART_SendHex8(USART2,reg);
UART_SendStr(USART2," = ");
UART_SendHex8(USART2,val);
UART_SendStr(USART2,"\t\t");
}
UART_SendStr(USART2,"\n========================================\n");
*/
BMC050_ACC_SoftReset();
Delay_ms(5); // must wait for start-up time of accelerometer (2ms)
BMC050_Init();
// Enable I2C watchdog timer with 50ms
BMC050_ACC_InterfaceConfig(ACC_IF_WDT_50ms);
UART_SendStr(USART2,"BMC050 ACC device ID: ");
UART_SendHex8(USART2,BMC050_ACC_GetDeviceID());
UART_SendChar(USART2,'\n');
UART_SendStr(USART2,"BMC050 MAG device ID: ");
UART_SendHex8(USART2,BMC050_MAG_GetDeviceID());
UART_SendChar(USART2,'\n');
UART_SendStr(USART2,"BMC050 temperature: ");
temp = BMC050_ReadTemp();
UART_SendInt(USART2,temp / 10);
UART_SendChar(USART2,'.');
UART_SendInt(USART2,temp % 10);
UART_SendStr(USART2,"C\n");
BMC050_ACC_SetBandwidth(ACC_BW8); // Accelerometer readings filtering (lower or higher better?)
BMC050_ACC_SetIRQMode(ACC_IM_NOLATCH); // No IRQ latching
BMC050_ACC_ConfigSlopeIRQ(0,16); // Motion detection sensitivity
BMC050_ACC_IntPinMap(ACC_IM1_SLOPE); // Map slope interrupt to INT1 pin
BMC050_ACC_SetIRQ(ACC_IE_SLOPEX | ACC_IE_SLOPEY | ACC_IE_SLOPEZ); // Detect motion by all axes
BMC050_ACC_LowPower(ACC_SLEEP_100); // Low power with sleep duration 0.1s
// BMC050_ACC_Suspend();
while(1);
/*
while(1) {
while (!BMC050_ACC_GetIRQStatus()); // Wait for new data from accelerometer
i8 = BMC050_ACC_GetTSIRQ();
BMC050_ACC_GetXYZ(&X,&Y,&Z);
UART_SendStr(USART2,"Slope=");
UART_SendHex8(USART2,i8);
UART_SendChar(USART2,' ');
if (i8 & ACC_TS_SLOPEZ) UART_SendStr(USART2,"SLOPEZ ");
if (i8 & ACC_TS_SLOPEY) UART_SendStr(USART2,"SLOPEY ");
if (i8 & ACC_TS_SLOPEX) UART_SendStr(USART2,"SLOPEX ");
UART_SendStr(USART2," X=");
UART_SendInt(USART2,X);
UART_SendStr(USART2," Y=");
UART_SendInt(USART2,Y);
UART_SendStr(USART2," Z=");
UART_SendInt(USART2,Z);
UART_SendChar(USART2,'\n');
BMC050_ACC_SetIRQMode(ACC_IM_RESET);
Delay_ms(100);
}
*/
}
