📄 bsp_gpt.c
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/*-----------------------------------------------------------------------------
* EUROPE TECHNOLOGIES Software Support
*------------------------------------------------------------------------------
* The software is delivered "AS IS" without warranty or condition of any
* kind, either express, implied or statutory. This includes without
* limitation any warranty or condition with respect to merchantability or
* fitness for any particular purpose, or against the infringements of
* intellectual property rights of others.
*------------------------------------------------------------------------------
*
* Processor : easyCAN
* File Name : bsp_gpt.c
* Description : Function declarations for Timer Channel for the BSP
* Version : 1.01
*
* +----- (NEW | MODify | ADD | DELete)
* |
* No | when who what
*-----+---+----------+------------------+--------------------------------------
* 000 NEW 15/06/00 Patrice VILCHEZ Creation
* 001 MOD 01/04/01 Olivier MAZUYER Clean up
* 002 MOD 13/07/01 David LEWIN Add functions : BSP_GPTLightOnLED
* BSP_GPTLightOffLED
* 003 MOD 31/01/02 Mahmoud Mesgarzadeh Clean Up
*----------------------------------------------------------------------------*/
/******************************************************************************
Include files
******************************************************************************/
#include "csp.h"
#include "bsp.h"
/******************************************************************************
* Function : BSP_GPTSetOutput
* Description : Set Output function of frequency & dutycycle
* Input : *gpt, tio, frequency, dutycycle
* Functions called : CSP_GPTInit, CSP_GPTStart, CSP_GPTStop, CSP_GPTPioInit,
* CSP_GPTPioSetStatus, CSP_GPTPioClearStatus
* Returns : None
******************************************************************************/
void BSP_GPTSetOutput(CSP_GPT_T *const gpt, U32_T tio, U32_T frequency_u32, U16_T dutycycle_u16)
{
/* local variables */
U8_T i_u8 = 0;
U32_T delay_u32;
U32_T pulse_u32;
U32_T clk_u32;
U32_T mode_u32;
U32_T pin_mask_u32;
U16_T reg_value_a_u16[3];
clk_u32 = (BSP_SYSTEM_CLOCK / 2);
if( frequency_u32 != 0)
{
/* Define delay & pulse function(frequency/dutycycle/prescalar) */
delay_u32 = ((clk_u32 * dutycycle_u16) / frequency_u32);
pulse_u32 = (clk_u32 / (frequency_u32/256)) - delay_u32;
/* Condition about cycle of clock */
while( (delay_u32 + pulse_u32) > 0xFFFF )
{
// a modifier fonction prescalar_0 dans MR setMode
i_u8++;
/* Define delay & pulse function(frequency/dutycycle/prescalar) */
clk_u32 /= 2;
delay_u32 = ((clk_u32 * dutycycle_u16) / frequency_u32);
pulse_u32 = ((clk_u32 / (frequency_u32/256)) - delay_u32);
}
/* Choice of the better Clock */
switch (i_u8)
{
case 0:
mode_u32 = CLKS_MCK2;
break;
case 1:
mode_u32 = CLKS_MCK8;
delay_u32 /= 2;
pulse_u32 /= 2;
break;
case 2:
mode_u32 = CLKS_MCK8;
break;
case 3:
mode_u32 = CLKS_MCK32;
delay_u32 /= 2;
pulse_u32 /= 2 ;
break;
case 4:
mode_u32 = CLKS_MCK32;
break;
case 5:
mode_u32 = CLKS_MCK128;
delay_u32 /= 2;
pulse_u32 /= 2;
break;
case 6:
mode_u32 = CLKS_MCK128;
break;
case 7:
mode_u32 = CLKS_MCK1024;
delay_u32 /= 4;
pulse_u32 /= 4;
break;
case 8:
mode_u32 = CLKS_MCK1024;
delay_u32 /= 2;
pulse_u32 /= 2;
break;
case 9:
mode_u32 = CLKS_MCK1024;
break;
default :
mode_u32 = CLKS_MCK1024;
delay_u32 = (frequency_u32 * dutycycle_u16 / 100) / 2^9;
pulse_u32 = (frequency_u32 * (1-dutycycle_u16 / 100)) / 2^9;
}
// TIOA Or TIOB Output selected
if (tio == TIOA)
{
/* configure GPT0 with TIOA */
mode_u32 |= ( WAVE | ACPA_SET | CPCTRG | ACPC_CLEAR);
reg_value_a_u16[0] = pulse_u32 - 1 ;
reg_value_a_u16[2] = delay_u32 + pulse_u32 - 1;
}
else if (tio == TIOB)
{
/* configure GPT0 with TIOB */
mode_u32 |= ( WAVE | BCPB_SET | CPCTRG | BCPC_CLEAR);
reg_value_a_u16[1] = pulse_u32 - 1 ;
reg_value_a_u16[2] = delay_u32 + pulse_u32 - 1;
}
/* Configure GPT mode */
CSP_GPTInit(gpt, mode_u32, reg_value_a_u16);
/* GPT_Start(GPT0CH0) */
CSP_GPT_SET_CR(gpt, (SWTRG | CLKEN));
}
/* Frequency Egual 0 */
else
{
/* Stop Timer Clock */
CSP_GPTDisable(gpt);
/* Which Timer Channel Line s*/
if (tio == TIOA)
{
pin_mask_u32 = TIOA;
}
else if (tio == TIOB)
{
pin_mask_u32 = TIOB;
}
/* Set Status Line to Low or High Level */
if( dutycycle_u16 == 256 )
CSP_GPTPioSet(gpt, pin_mask_u32);
else
CSP_GPTPioClear(gpt, pin_mask_u32);
/* Configure Line as Pio & Output */
CSP_GPTPioInit(gpt, pin_mask_u32, pin_mask_u32);
}
}
/******************************************************************************
* Function : BSP_GPTLightOnLED
* Description : Light on LED
* Input : led
* Functions called : None
* Returns : None
******************************************************************************/
void BSP_GPTLightOnLED(U32_T led)
{
/* If red LED is selected, do the following to light on red LED */
if ((led & RED) == RED)
{
/* Enable channel 0 PIO clock */
CSP_GPT_SET_ECR(GPT0CH0, PIO);
/* Enable the PIO to control TIOA1 pin */
CSP_GPT_SET_PER(GPT0CH0, TIOA);
/* Enable the PIO output on TIOA1 pin */
CSP_GPT_SET_OER(GPT0CH0, TIOA);
/* Set output on TIOA1 pin */
CSP_GPT_SET_SODR(GPT0CH0, TIOA);
}
/* If orange LED is selected, do the following to light on orange LED */
if ((led & ORANGE) == ORANGE)
{
/* Enable channel 0 PIO clock */
CSP_GPT_SET_ECR(GPT0CH0, PIO);
/* Enable the PIO to control TIOB0 pin */
CSP_GPT_SET_PER(GPT0CH0, TIOB);
/* Enable the PIO output on TIOB0 pin */
CSP_GPT_SET_OER(GPT0CH0, TIOB);
/* Set output on TIOB0 pin */
CSP_GPT_SET_SODR(GPT0CH0, TIOB);
}
/* If green LED is selected, do the following to light on green LED */
if ((led & GREEN) == GREEN)
{
/* Enable channel 1 PIO clock */
CSP_GPT_SET_ECR(GPT0CH1, PIO);
/* Enable the PIO to control TIOA0 pin */
CSP_GPT_SET_PER(GPT0CH1, TIOA);
/* Enable the PIO output on TIOA0 pin */
CSP_GPT_SET_OER(GPT0CH1, TIOA);
/* Set output on TIOA0 pin */
CSP_GPT_SET_SODR(GPT0CH1, TIOA);
}
}
/******************************************************************************
* Function : BSP_GPTLightOffLED
* Description : Light off LED
* Input : led
* Functions called : None
* Returns : None
******************************************************************************/
void BSP_GPTLightOffLED(U32_T led)
{
/* If red LED is selected, do the following to light off red LED */
if ((led & RED) == RED)
{
/* Enable channel 0 PIO clock */
CSP_GPT_SET_ECR(GPT0CH0, PIO);
/* Enable the PIO to control TIOA1 pin */
CSP_GPT_SET_PER(GPT0CH0, TIOA);
/* Enable the PIO output on TIOA1 pin */
CSP_GPT_SET_OER(GPT0CH0, TIOA);
/* Clear output on TIOA1 pin */
CSP_GPT_SET_CODR(GPT0CH0, TIOA);
}
/* If orange LED is selected, do the following to light on orange LED */
if ((led & ORANGE) == ORANGE)
{
/* Enable channel 0 PIO clock */
CSP_GPT_SET_ECR(GPT0CH0, PIO);
/* Enable the PIO to control TIOB0 pin */
CSP_GPT_SET_PER(GPT0CH0, TIOB);
/* Enable the PIO output on TIOB0 pin */
CSP_GPT_SET_OER(GPT0CH0, TIOB);
/* Clear output on TIOB0 pin */
CSP_GPT_SET_CODR(GPT0CH0, TIOB);
}
/* If green LED is selected, do the following to light on green LED */
if ((led & GREEN) == GREEN)
{
/* Enable channel 1 PIO clock */
CSP_GPT_SET_ECR(GPT0CH1, PIO);
/* Enable the PIO to control TIOA0 pin */
CSP_GPT_SET_PER(GPT0CH1, TIOA);
/* Enable the PIO output on TIOA0 pin */
CSP_GPT_SET_OER(GPT0CH1, TIOA);
/* Clear output on TIOA0 pin */
CSP_GPT_SET_CODR(GPT0CH1, TIOA);
}
}
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