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Color Oled(SSD1331) connect to STMicroelectronics Nucleo-F466
Diff: mbed-os/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c
- Revision:
- 0:8fdf9a60065b
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed-os/targets/TARGET_NUVOTON/TARGET_M451/pwmout_api.c Wed Oct 10 00:33:53 2018 +0000 @@ -0,0 +1,184 @@ +/* mbed Microcontroller Library + * Copyright (c) 2015-2016 Nuvoton + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "pwmout_api.h" + +#if DEVICE_PWMOUT + +#include "cmsis.h" +#include "pinmap.h" +#include "PeripheralPins.h" +#include "nu_modutil.h" +#include "nu_miscutil.h" +#include "nu_bitutil.h" + +struct nu_pwm_var { + uint32_t en_msk; +}; + +static struct nu_pwm_var pwm0_var = { + .en_msk = 0 +}; + +static struct nu_pwm_var pwm1_var = { + .en_msk = 0 +}; + +static uint32_t pwm_modinit_mask = 0; + +static const struct nu_modinit_s pwm_modinit_tab[] = { + {PWM_0_0, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P0_IRQn, &pwm0_var}, + {PWM_0_1, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P0_IRQn, &pwm0_var}, + {PWM_0_2, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P1_IRQn, &pwm0_var}, + {PWM_0_3, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P1_IRQn, &pwm0_var}, + {PWM_0_4, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P2_IRQn, &pwm0_var}, + {PWM_0_5, PWM0_MODULE, CLK_CLKSEL2_PWM0SEL_PCLK0, 0, PWM0_RST, PWM0P2_IRQn, &pwm0_var}, + + {PWM_1_0, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P0_IRQn, &pwm1_var}, + {PWM_1_1, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P0_IRQn, &pwm1_var}, + {PWM_1_2, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P1_IRQn, &pwm1_var}, + {PWM_1_3, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P1_IRQn, &pwm1_var}, + {PWM_1_4, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P2_IRQn, &pwm1_var}, + {PWM_1_5, PWM1_MODULE, CLK_CLKSEL2_PWM1SEL_PCLK1, 0, PWM1_RST, PWM1P2_IRQn, &pwm1_var}, + + {NC, 0, 0, 0, 0, (IRQn_Type) 0, NULL} +}; + +static void pwmout_config(pwmout_t* obj); + +void pwmout_init(pwmout_t* obj, PinName pin) +{ + obj->pwm = (PWMName) pinmap_peripheral(pin, PinMap_PWM); + MBED_ASSERT((int) obj->pwm != NC); + + const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab); + MBED_ASSERT(modinit != NULL); + MBED_ASSERT(modinit->modname == obj->pwm); + + // NOTE: All channels (identified by PWMName) share a PWM module. This reset will also affect other channels of the same PWM module. + if (! ((struct nu_pwm_var *) modinit->var)->en_msk) { + // Reset this module if no channel enabled + SYS_ResetModule(modinit->rsetidx); + } + + PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm); + uint32_t chn = NU_MODSUBINDEX(obj->pwm); + + // NOTE: Channels 0/1/2/3/4/5 share a clock source. + if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0x3F) == 0) { + // Select clock source of paired channels + CLK_SetModuleClock(modinit->clkidx, modinit->clksrc, modinit->clkdiv); + // Enable clock of paired channels + CLK_EnableModuleClock(modinit->clkidx); + } + + // Wire pinout + pinmap_pinout(pin, PinMap_PWM); + + // Default: period = 10 ms, pulse width = 0 ms + obj->period_us = 1000 * 10; + obj->pulsewidth_us = 0; + pwmout_config(obj); + + // Enable output of the specified PWM channel + PWM_EnableOutput(pwm_base, 1 << chn); + PWM_Start(pwm_base, 1 << chn); + + ((struct nu_pwm_var *) modinit->var)->en_msk |= 1 << chn; + + // Mark this module to be inited. + int i = modinit - pwm_modinit_tab; + pwm_modinit_mask |= 1 << i; +} + +void pwmout_free(pwmout_t* obj) +{ + PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm); + uint32_t chn = NU_MODSUBINDEX(obj->pwm); + PWM_ForceStop(pwm_base, 1 << chn); + + const struct nu_modinit_s *modinit = get_modinit(obj->pwm, pwm_modinit_tab); + MBED_ASSERT(modinit != NULL); + MBED_ASSERT(modinit->modname == obj->pwm); + ((struct nu_pwm_var *) modinit->var)->en_msk &= ~(1 << chn); + + + if ((((struct nu_pwm_var *) modinit->var)->en_msk & 0x3F) == 0) { + CLK_DisableModuleClock(modinit->clkidx); + } + + // Mark this module to be deinited. + int i = modinit - pwm_modinit_tab; + pwm_modinit_mask &= ~(1 << i); +} + +void pwmout_write(pwmout_t* obj, float value) +{ + obj->pulsewidth_us = NU_CLAMP((uint32_t) (value * obj->period_us), 0, obj->period_us); + pwmout_config(obj); +} + +float pwmout_read(pwmout_t* obj) +{ + return NU_CLAMP((((float) obj->pulsewidth_us) / obj->period_us), 0.0f, 1.0f); +} + +void pwmout_period(pwmout_t* obj, float seconds) +{ + pwmout_period_us(obj, seconds * 1000000.0f); +} + +void pwmout_period_ms(pwmout_t* obj, int ms) +{ + pwmout_period_us(obj, ms * 1000); +} + +// Set the PWM period, keeping the duty cycle the same. +void pwmout_period_us(pwmout_t* obj, int us) +{ + uint32_t period_us_old = obj->period_us; + uint32_t pulsewidth_us_old = obj->pulsewidth_us; + obj->period_us = us; + obj->pulsewidth_us = NU_CLAMP(obj->period_us * pulsewidth_us_old / period_us_old, 0, obj->period_us); + pwmout_config(obj); +} + +void pwmout_pulsewidth(pwmout_t* obj, float seconds) +{ + pwmout_pulsewidth_us(obj, seconds * 1000000.0f); +} + +void pwmout_pulsewidth_ms(pwmout_t* obj, int ms) +{ + pwmout_pulsewidth_us(obj, ms * 1000); +} + +void pwmout_pulsewidth_us(pwmout_t* obj, int us) +{ + obj->pulsewidth_us = NU_CLAMP(us, 0, obj->period_us); + pwmout_config(obj); +} + +static void pwmout_config(pwmout_t* obj) +{ + PWM_T *pwm_base = (PWM_T *) NU_MODBASE(obj->pwm); + uint32_t chn = NU_MODSUBINDEX(obj->pwm); + // NOTE: Support period < 1s + //PWM_ConfigOutputChannel(pwm_base, chn, 1000 * 1000 / obj->period_us, obj->pulsewidth_us * 100 / obj->period_us); + PWM_ConfigOutputChannel2(pwm_base, chn, 1000 * 1000, obj->pulsewidth_us * 100 / obj->period_us, obj->period_us); +} + +#endif