📄 bsp.c
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case 4:
AT91C_BASE_PIOA->PIO_CODR = BSP_LED4;
break;
}
}
/*
*********************************************************************************************************
* LED OFF
*
* Description : This function is used to control any or all the LEDs on the board.
*
* Arguments : led is the number of the LED to turn OFF
* 0 indicates that you want ALL the LEDs to be OFF
* 1 turns OFF LED1 on the board
* .
* .
* 4 turns OFF LED4 on the board
*********************************************************************************************************
*/
void LED_Off (CPU_INT08U led)
{
switch (led) {
case 0:
AT91C_BASE_PIOA->PIO_SODR = BSP_LED4 | BSP_LED3 | BSP_LED2 | BSP_LED1;
break;
case 1:
AT91C_BASE_PIOA->PIO_SODR = BSP_LED1;
break;
case 2:
AT91C_BASE_PIOA->PIO_SODR = BSP_LED2;
break;
case 3:
AT91C_BASE_PIOA->PIO_SODR = BSP_LED3;
break;
case 4:
AT91C_BASE_PIOA->PIO_SODR = BSP_LED4;
break;
}
}
/*
*********************************************************************************************************
* LED TOGGLE
*
* Description : This function is used to toggle any or all the LEDs on the board.
*
* Arguments : led is the number of the LED to toggle
* 0 indicates that you want ALL the LEDs to be toggle
* 1 toggles LED1 on the board
* .
* .
* 4 toggles LED4 on the board
*********************************************************************************************************
*/
void LED_Toggle (CPU_INT08U led)
{
switch (led) {
case 0:
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED1) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED1;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED1;
}
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED2) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED2;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED2;
}
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED3) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED3;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED3;
}
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED4) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED4;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED4;
}
break;
case 1:
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED1) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED1;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED1;
}
break;
case 2:
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED2) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED2;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED2;
}
break;
case 3:
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED3) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED3;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED3;
}
break;
case 4:
if (AT91C_BASE_PIOA->PIO_ODSR & BSP_LED4) {
AT91C_BASE_PIOA->PIO_CODR = BSP_LED4;
} else {
AT91C_BASE_PIOA->PIO_SODR = BSP_LED4;
}
break;
}
}
/*
*********************************************************************************************************
* TICKER INITIALIZATION
*
* Description : This function is called to initialize uC/OS-II's tick source which uses the PIT
* (typically a timer generating interrupts every 1 to 100 mS).
*
* Arguments : none
*
* Note(s) : 1) PIT Interrupt frequency:
*
* MCLK 1
* Freq = ---- * -----------
* 16 (PIV + 1)
*
*
* MCLK 1
* PIV = ( ---- * ------ ) - 1
* 16 Freq
*
* Where:
* MCLK = 48 MHz (i.e 48,000,000)
* Freq = Desired frequency (i.e. OS_TICKS_PER_SEC)
*********************************************************************************************************
*/
static void Tmr_TickInit (void)
{
CPU_INT32U counts;
CPU_INT32U frq;
/* Get the CPU Clock frequency in KHZ */
frq = BSP_CPU_ClkFreq();
/* Convert the FRQ from KHZ to HZ */
frq *= 1000;
/* Set the vector address for PIT */
AT91C_BASE_AIC->AIC_SVR[AT91C_ID_SYS] = (CPU_INT32U)Tmr_TickISR_Handler;
AT91C_BASE_AIC->AIC_SMR[AT91C_ID_SYS] = AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL
| AT91C_AIC_PRIOR_HIGHEST;
AT91C_BASE_AIC->AIC_ICCR = 1 << AT91C_ID_SYS;
AT91C_BASE_AIC->AIC_IECR = 1 << AT91C_ID_SYS;
counts = (frq / 16 / OS_TICKS_PER_SEC) - 1;
AT91C_BASE_PITC->PITC_PIMR = AT91C_PITC_PITEN | AT91C_PITC_PITIEN | counts;
}
/*
*********************************************************************************************************
* PIT IRQ HANDLER
*
* Description : This function handles the PIT interrupt that is used to generate TICKs for uC/OS-II.
*
* Arguments : none
*********************************************************************************************************
*/
static void Tmr_TickISR_Handler (void)
{
volatile CPU_INT32U status;
status = AT91C_BASE_PITC->PITC_PIVR;
AT91C_BASE_AIC->AIC_IVR = 0; /* Debug variant of vector read (protect mode is used) */
AT91C_BASE_AIC->AIC_ICCR = AT91C_ID_SYS; /* Clear timer #0 interrupt */
AT91C_BASE_AIC->AIC_EOICR = 0; /* Signal end of interrupt */
OSTimeTick(); /* Tell uC/OS-II about clock tick */
}
/*
*********************************************************************************************************
* OSView Timer Initialization
*
* Description : This function selects and initializes a timer for use with OSView and the Statistics Task
*
* Arguments : none
*********************************************************************************************************
*/
#if OS_VIEW_MODULE > 0
void OSView_TmrInit (void)
{
#if OS_VIEW_TIMER_SEL == 0
AT91C_BASE_PMC->PMC_PCER = (1 << 12); /* Enable the peripheral clk */
AT91C_BASE_TCB->TCB_TC0.TC_CCR = (1 << 1); /* TC0 timer disabled */
AT91C_BASE_TCB->TCB_TC0.TC_CMR &= ~(7 << 0); /* TIMER_CLOCK1 is input clk */
AT91C_BASE_TCB->TCB_TC0.TC_CCR = (1 << 0); /* TC0 timer enabled */
AT91C_BASE_TCB->TCB_TC0.TC_CCR = (1 << 2); /* SWTRG to reset and start */
#endif
#if OS_VIEW_TIMER_SEL == 1
AT91C_BASE_PMC->PMC_PCER = (1 << 13); /* Enable the peripheral clk */
AT91C_BASE_TCB->TCB_TC1.TC_CCR = (1 << 1); /* TC1 timer disabled */
AT91C_BASE_TCB->TCB_TC1.TC_CMR &= ~(7 << 0); /* TIMER_CLOCK1 is input clk */
AT91C_BASE_TCB->TCB_TC1.TC_CCR = (1 << 0); /* TC1 timer enabled */
AT91C_BASE_TCB->TCB_TC1.TC_CCR = (1 << 2); /* SWTRG to reset and start */
#endif
#if OS_VIEW_TIMER_SEL == 2
AT91C_BASE_PMC->PMC_PCER = (1 << 14); /* Enable the peripheral clk */
AT91C_BASE_TCB->TCB_TC2.TC_CCR = (1 << 1); /* TC2 timer disabled */
AT91C_BASE_TCB->TCB_TC2.TC_CMR &= ~(7 << 0); /* TIMER_CLOCK1 is input clk */
AT91C_BASE_TCB->TCB_TC2.TC_CCR = (1 << 0); /* TC2 timer enabled */
AT91C_BASE_TCB->TCB_TC2.TC_CCR = (1 << 2); /* SWTRG to reset and start */
#endif
}
#endif
/*
*********************************************************************************************************
* READ TIMER FOR uC/OS-View
*
* Description : This function is called to read the current counts of a 16 bit free running timer.
*
* Arguments : none
*
* Returns ; The 16 bit count (in a 32 bit variable) of the timer assuming the timer is an UP counter.
*********************************************************************************************************
*/
#if OS_VIEW_MODULE > 0
CPU_INT32U OSView_TmrRd (void)
{
CPU_INT32U cnts;
#if OS_VIEW_TIMER_SEL == 0
cnts = (CPU_INT32U)(AT91C_BASE_TCB->TCB_TC0.TC_CV & 0x0000FFFF); /* Read timer 0 */
#endif
#if OS_VIEW_TIMER_SEL == 1
cnts = (CPU_INT32U)(AT91C_BASE_TCB->TCB_TC1.TC_CV & 0x0000FFFF); /* Read timer 1 */
#endif
#if OS_VIEW_TIMER_SEL == 2
cnts = (CPU_INT32U)(AT91C_BASE_TCB->TCB_TC2.TC_CV & 0x0000FFFF); /* Read timer 2 */
#endif
return (cnts);
}
#endif
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