jg
New Member
Posts: 5
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Post by jg on Nov 8, 2018 13:59:25 GMT
Hi all,
I want to make a LED blink using the TOM. I have it working but changing the clock in the tomConfig struct doesn't seem to have an effect. What am I doing wrong?
#include "vt100.h"
#include "IfxPort_PinMap.h"
#include <Gtm/Tom/Pwm/IfxGtm_Tom_Pwm.h>
Ifx_GTM *gtm = &MODULE_GTM;
boolean tom_status = false;
float32 frequency;
void setup() {
/*************************************
* SERIAL CONFIGURATION
*************************************/
SerialASC.begin(9600);
SerialASC.print(VT100_CURSOR_OFF);
SerialASC.print(VT100_CLR_SCREEN);
/*************************************
* PWM CONFIGURATION
*************************************/
// Enable GTM Module
IfxGtm_enable(gtm);
frequency = IfxGtm_Cmu_getModuleFrequency(gtm); // Returns 100MHz
// Select the CMU_CLK_5 as input for FXU
gtm->CMU.FXCLK.CTRL.B.FXCLK_SEL = 6;
// Set the clock divider to 1000
gtm->CMU.CLK0_5[5].CTRL.B.CLK_CNT = 1000;
// Enable CMU_CLK_5 and FXU clock
IfxGtm_Cmu_enableClocks(gtm, IFXGTM_CMU_CLKEN_FXCLK | IFXGTM_CMU_CLKEN_CLK5);
// Initialise TOM
IfxGtm_Tom_Pwm_Config tomConfig; // Configuration structure
IfxGtm_Tom_Pwm_Driver tomHandle; // Handle
// Initialise struct
IfxGtm_Tom_Pwm_initConfig(&tomConfig, gtm);
tomConfig.clock = IfxGtm_Tom_Ch_ClkSrc_cmuFxclk0; // Has no effect...?
tomConfig.tom = IfxGtm_Tom_0;
tomConfig.tomChannel = IfxGtm_Tom_Ch_2;
tomConfig.period = 2*32767;
tomConfig.dutyCycle = 0.5*tomConfig.period; // 50% duty cycle
tomConfig.interrupt.ccu0Enabled = FALSE;
tomConfig.pin.outputPin = &IfxGtm_TOM0_2_TOUT104_P10_2_OUT; // ShieldBuddy LED
// Start TOM -> LED will blink
tom_status = IfxGtm_Tom_Pwm_init(&tomHandle, &tomConfig);
}
void loop() {
delay(200);
//SerialASC.print("ADC Val: ");
if(tom_status)
SerialASC.print("Running ");
else
SerialASC.print("Error ");
SerialASC.print(frequency);
SerialASC.print("\r\n");
}
void setup1(){
}
void loop1(){
}
void setup2(){
}
void loop2(){
}
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Post by Admin on Nov 8, 2018 14:23:37 GMT
The ShieldBuddy startup code has already initialised the GTM so this might cause problems if you then try to re-initialise it using iLLD functions. Here is what it does:
void setupGtmClocks(void)
{
uint16 endinitPw;
uint16 SEndInitPW;
/* Disable Safety Einit */
SEndInitPW = IfxScuWdt_getSafetyWatchdogPassword();
IfxScuWdt_clearSafetyEndinit(SEndInitPW);
/* Set GTM base clock */
SCU_CCUCON1.B.GTMDIV = HTX_GTM_CCUCON1_GTMDIV_2;
SCU_CCUCON1.B.UP = TRUE;
/* Reinstate Safety Einit */
IfxScuWdt_setSafetyEndinit(SEndInitPW);
/* Clear the EndInit */
endinitPw = IfxScuWdt_getCpuWatchdogPassword();
IfxScuWdt_clearCpuEndinit(endinitPw);
/* If the module is disabled then re-enable it */
while(GTM_CLC.B.DISS == 1u)
{
/* Enable GTM */
GTM_CLC.B.DISR = 0u;
}
/* Re-enable SFR protection */
IfxScuWdt_setCpuEndinit (endinitPw);
/* Check to see if the configurable clocks are enabled */
if(GTM_CMU_CLK_EN.B.EN_CLK0 == HTX_CMU_CLOCK_IS_ENABLED)
{
/* Disable configurable clock 0 and reset internal states */
GTM_CMU_CLK_EN.B.EN_CLK0 = HTX_CMU_DISABLE_CLOCK;
}
if(GTM_CMU_CLK_EN.B.EN_CLK1 == HTX_CMU_CLOCK_IS_ENABLED)
{
/* Disable configurable clock 1 and reset internal states */
GTM_CMU_CLK_EN.B.EN_CLK1 = HTX_CMU_DISABLE_CLOCK;
}
if(GTM_CMU_CLK_EN.B.EN_CLK2 == HTX_CMU_CLOCK_IS_ENABLED)
{
/* Disable configurable clock 2 and reset internal states */
GTM_CMU_CLK_EN.B.EN_CLK2 = HTX_CMU_DISABLE_CLOCK;
}
if(GTM_CMU_CLK_EN.B.EN_CLK3 == HTX_CMU_CLOCK_IS_ENABLED)
{
/* Disable configurable clock 3 and reset internal states */
GTM_CMU_CLK_EN.B.EN_CLK3 = HTX_CMU_DISABLE_CLOCK;
}
if(GTM_CMU_CLK_EN.B.EN_CLK4 == HTX_CMU_CLOCK_IS_ENABLED)
{
/* Disable configurable clock 4 and reset internal states */
GTM_CMU_CLK_EN.B.EN_CLK4 = HTX_CMU_DISABLE_CLOCK;
}
/* Configurable clock 0 - set to Divide By 1 */
GTM_CMU_CLK_0_CTRL.U = ((uint32) 0x0u);
/* Configurable clock 1 - set to Divide By 16 */
GTM_CMU_CLK_1_CTRL.U = ((uint32) 0xFu);
/* Configurable clock 2 - set to Divide By 256 */
GTM_CMU_CLK_2_CTRL.U = ((uint32) 0xFFu);
/* Configurable clock 3 - set to Divide By 4096 */
GTM_CMU_CLK_3_CTRL.U = ((uint32) 0xFFFu);
/* Configurable clock 4 - set to Divide By 65536 */
GTM_CMU_CLK_4_CTRL.U = ((uint32) CMU_CLK4_val);
/* Disable TBU CH0 Counter */
GTM_TBU_CHEN.B.ENDIS_CH0 = 1;
/* Enable configurable clocks 0-4 */
GTM_CMU_CLK_EN.B.EN_CLK0 = HTX_CMU_ENABLE_CLOCK;
GTM_CMU_CLK_EN.B.EN_CLK1 = HTX_CMU_ENABLE_CLOCK;
GTM_CMU_CLK_EN.B.EN_CLK2 = HTX_CMU_ENABLE_CLOCK;
GTM_CMU_CLK_EN.B.EN_CLK3 = HTX_CMU_ENABLE_CLOCK;
GTM_CMU_CLK_EN.B.EN_CLK4 = HTX_CMU_ENABLE_CLOCK;
} /* end of setupGtmClocks */
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jg
New Member
Posts: 5
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Post by jg on Nov 8, 2018 14:37:28 GMT
Gotcha! That could be the cause of the problem  Thanks for the fast reply! |
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