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PWM - changes to start the channel

pull/135/head
0xc0170 2013-12-10 15:57:43 +01:00
parent d8d526f656
commit 5e9e53f934
2 changed files with 10 additions and 2 deletions
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1
libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20D5M/objects.h
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@ -43,6 +43,7 @@ struct pwmout_s {
__IO uint32_t *MOD;
__IO uint32_t *CNT;
__IO uint32_t *CnV;
__IO uint32_t *SYNC;
};
struct serial_s {

11
libraries/mbed/targets/hal/TARGET_Freescale/TARGET_K20D5M/pwmout_api.c
View File

@ -22,11 +22,11 @@
static const PinMap PinMap_PWM[] = {
// LEDs
{LED_RED , PWM_3 , 3}, // PTC3, FTM0 CH2
{LED_GREEN, PWM_5, 3}, // PTD4, FTM0 CH4
{LED_GREEN, PWM_5, 3}, // PTD4, FTM0 CH4
{LED_BLUE , PWM_9 , 3}, // PTA2 , FTM0 CH7
// Arduino digital pinout
{D3, PWM_5 , 3}, // PTA12, FTM0 CH4
{D3, PWM_5 , 3}, // PTD4, FTM0 CH4
{D5, PWM_7 , 3}, // PTA1 , FTM0 CH6
{D6, PWM_3 , 3}, // PTC3 , FTM0 CH2
{D9, PWM_8 , 4}, // PTD2 , FTM0 CH7
@ -51,12 +51,18 @@ void pwmout_init(pwmout_t* obj, PinName pin) {
SIM->SCGC6 |= 1 << (SIM_SCGC6_FTM0_SHIFT + ftm_n);
FTM_Type *ftm = (FTM_Type *)(FTM0_BASE + 0x1000 * ftm_n);
ftm->MODE |= FTM_MODE_WPDIS_MASK; //write protection disabled
ftm->CONF |= FTM_CONF_BDMMODE(3);
ftm->SC = FTM_SC_CLKS(1) | FTM_SC_PS(6); // (48)MHz / 64 = (0.75)MHz
ftm->CONTROLS[ch_n].CnSC = (FTM_CnSC_MSB_MASK | FTM_CnSC_ELSB_MASK); /* No Interrupts; High True pulses on Edge Aligned PWM */
ftm->PWMLOAD |= FTM_PWMLOAD_LDOK_MASK; //loading updated values enabled
//ftm->SYNCONF |= FTM_SYNCONF_SWRSTCNT_MASK;
ftm->MODE |= FTM_MODE_INIT_MASK;
obj->CnV = &ftm->CONTROLS[ch_n].CnV;
obj->MOD = &ftm->MOD;
obj->CNT = &ftm->CNT;
obj->SYNC = &ftm->SYNC;
// default to 20ms: standard for servos, and fine for e.g. brightness control
pwmout_period_ms(obj, 20);
@ -77,6 +83,7 @@ void pwmout_write(pwmout_t* obj, float value) {
*obj->CnV = (uint32_t)((float)(*obj->MOD) * value);
*obj->CNT = 0;
//*obj->SYNC |= FTM_SYNC_SWSYNC_MASK;
}
float pwmout_read(pwmout_t* obj) {