/**
* @brief timer hardware routine
*/
void timer_hardware_init(uint8_t interval, uint8_t scale){
HAS_CRITICAL_SECTION;
unsigned long timer_value;
timer_value = ((0x10000L*(16*1000)-((interval)*(CCLK)))/(16*1000));
ENTER_CRITICAL_SECTION();
IRQ_HANDLER_TABLE[INT_TIMER0] = timer0_interrupt_handler;
set_wbit(ILC, ILC_ILC16 & ILC_INT_LV1); /* interrupt level of
|| || IRQ number 16 (timer0) is set as 1
IRQ number interrupt level */
//! Initialize and start hardware timer
set_timer(timer_value);
LEAVE_CRITICAL_SECTION();
// enable timer by writing '1' in TMEN[0] register
put_wvalue(TMEN, 0x01);
//! Call the SOS timer init function
timer_init();
}
void init_i2c(void)
{
//Set secondary function for PB4 and PB5 => I2C bus : SCL + SDA
set_wbit(PORTSEL1,0x05000000);
//I2C peripheral select
set_hbit(I2CCTL,I2CCTL_I2CMEN);
//I2C slave address
put_hvalue(I2CSADR,0x0000);
//I2C bus speed
put_hvalue(I2CBC,0x0028); //100kHz @32MHz
//I2CBC = (APB_CLK)/( I2C bus speed x 8)
//I2C control register
put_hvalue(I2CCTL,0x0080);
//I2CCS=0
//enable I2C module
//selects standard mode 100kHz
}
void uart_hardware_init(void)
{
//HAS_CRITICAL_SECTION;
//ENTER_CRITICAL_SECTION();
//LEAVE_CRITICAL_SECTION();
if(uart_initialized == false) {
set_hbit(GPCTL,GPCTL_UART);
put_hvalue(GPPMB,0); // disable SIO bits 6 and 7
put_hvalue(GPPOB,0);
put_hvalue(GPPMA,0x0002); // RX is input (A0), TX is output (A1)
put_hvalue(GPPOA,0);
put_value(UARTIER,0); // no interrupts
put_value(UARTLCR,0x80); // enable access to divisor latch
put_value(UARTDLM,0);
put_value(UARTDLL,0x3E); // 57600 baud
put_value(UARTLCR,0x03);
put_value(UARTFCR,0xC7); // 14 byte trigger, cleared and buffered (auto set to normal FCR mode)
put_value(UARTMCR,0);
put_value(UARTIER,0x01); // RX
IRQ_HANDLER_TABLE[INT_UART]=uart_interrupt_handler;
set_wbit(ILC1,ILC1_ILR9 & ILC1_INT_LV3);
set_hbit(GPPMC, UART_EN); // set PIOC6(UART_EN) to output
set_hbit(GPPMC, UART_FORCEOFF); // set PIOC7(FORCEOFF) to output
set_hbit(GPCTL,GPCTL_UART);
put_hvalue(GPPMA,0x0002); // RX is input (A0), TX is output (A1)
put_hvalue(GPPOA,0);
clr_hbit(GPPOC,UART_EN);
set_hbit(GPPOC,UART_FORCEOFF); // this also drives FORCEON -- they are tied together
uart_initialized = true;
}
}
void enable_timer(void)
{
set_wbit(ILC, ILC_ILC16);
}
