MATSU-bed(LPC1549)でPWMを4つ以上出すプログラム
Dependents: servo_controller_1549
pwm_all_api.cpp
- Committer:
- hardtail
- Date:
- 2018-02-16
- Revision:
- 3:af461f11cef6
- Parent:
- pwm_all_api.c@ 2:322ad3eef278
- Child:
- 4:49ee58dc8e4d
File content as of revision 3:af461f11cef6:
/* mbed Microcontroller Library * Copyright (c) 2006-2013 ARM Limited * * 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 "mbed_assert.h" #include "pwm_all_api.h" #include "cmsis.h" #include "pinmap.h" #include "mbed_error.h" static LPC_SCT0_Type *SCTs[4] = { (LPC_SCT0_Type*)LPC_SCT0, (LPC_SCT0_Type*)LPC_SCT1, (LPC_SCT0_Type*)LPC_SCT2, (LPC_SCT0_Type*)LPC_SCT3, }; // bit flags for used SCTs static unsigned char sct_used = 0; static int get_available_sct(void) { int i; for (i=0; i<24; i++) { if ((sct_used & (1 << i)) == 0) return i; } return -1; } static LPC_SCT0_Type *check_SCT_module(PinName pin){ switch((int)pin){ case P0_0: case P0_1: case P0_5: case P0_7: case P0_8: case P0_18: return (LPC_SCT0_Type*)LPC_SCT0; case P0_2: case P0_3: case P0_9: case P0_10: case P0_11: case P0_14: case P0_20: return (LPC_SCT0_Type*)LPC_SCT1; case P0_6: case P0_12: return (LPC_SCT0_Type*)LPC_SCT2; case P0_15: case P0_17: case P0_19: return (LPC_SCT0_Type*)LPC_SCT3; } } uint32_t pwm_ch_map(PinName pin){ switch((int)pin){ case P0_0: case P0_1: case P0_5: case P0_7: case P0_8: case P0_18: return 0; case P0_2: case P0_3: case P0_9: case P0_10: case P0_11: case P0_14: case P0_20: return 1; case P0_6: case P0_12: return 2; case P0_15: case P0_17: case P0_19: return 3; } } uint32_t pwm_out_map[] = {3, 4, 3, 4, 0, 0, 3, 1, 2, 0, 1, 2, 1, 0, 5, 0, 0, 1, 5, 2, 6, 6, 0}; void pwmout_init(pwmout_t* obj, PinName pin) { MBED_ASSERT(pin != (uint32_t)NC); int sct_n = get_available_sct(); if (sct_n == -1) { error("No available SCT"); } sct_used |= (1 << sct_n); //obj->pwm = SCTs[sct_n]; obj->pwm = check_SCT_module(pin); //obj->pwm_ch = sct_n; obj->pwm_ch = pwm_ch_map(pin); obj->out_ch = pwm_out_map[pin]; obj->pin = (int)pin; LPC_SCT0_Type* pwm = obj->pwm; // Enable the SCT clock LPC_SYSCON->SYSAHBCLKCTRL1 |= (1 << (obj->pwm_ch + 2)); // Clear peripheral reset the SCT: //LPC_SYSCON->PRESETCTRL1 |= (1 << (obj->pwm_ch + 2)); //LPC_SYSCON->PRESETCTRL1 &= ~(1 << (obj->pwm_ch + 2)); switch(obj->pwm_ch) { case 0: // SCT0_OUT0 //LPC_SWM->PINASSIGN[7] &= ~0x0000FF00; //LPC_SWM->PINASSIGN[7] |= (pin << 8); switch(obj->out_ch){ case 0: LPC_SWM->PINASSIGN[7] &= ~0x0000FF00; LPC_SWM->PINASSIGN[7] |= (pin << 8); break; case 1: LPC_SWM->PINASSIGN[7] &= ~0x00FF0000; LPC_SWM->PINASSIGN[7] |= (pin << 16); break; case 2: LPC_SWM->PINASSIGN[7] &= ~0xFF000000; LPC_SWM->PINASSIGN[7] |= (pin << 24); break; case 3: LPC_SWM->PINENABLE1 &= ~(1 << 5); break; case 4: LPC_SWM->PINENABLE1 &= ~(1 << 6); break; case 5: LPC_SWM->PINENABLE1 &= ~(1 << 7); break; case 6: LPC_SWM->PINENABLE1 &= ~(1 << 8); break; } break; case 1: // SCT1_OUT0 //LPC_SWM->PINASSIGN[8] &= ~0x000000FF; //LPC_SWM->PINASSIGN[8] |= (pin); switch(obj->out_ch){ case 0: LPC_SWM->PINASSIGN[8] &= ~0x000000FF; LPC_SWM->PINASSIGN[8] |= (pin); break; case 1: LPC_SWM->PINASSIGN[8] &= ~0x0000FF00; LPC_SWM->PINASSIGN[8] |= (pin << 8); break; case 2: LPC_SWM->PINASSIGN[8] &= ~0x00FF0000; LPC_SWM->PINASSIGN[8] |= (pin << 16); break; case 3: LPC_SWM->PINENABLE1 &= ~(1 << 10); break; case 4: LPC_SWM->PINENABLE1 &= ~(1 << 11); break; case 5: LPC_SWM->PINENABLE1 &= ~(1 << 12); break; case 6: LPC_SWM->PINENABLE1 &= ~(1 << 13); LPC_SWM->PINENABLE1 |= (1 << 22); LPC_SWM->PINENABLE1 |= (1 << 23); break; } break; case 2: // SCT2_OUT0 // LPC_SWM->PINASSIGN[8] &= ~0xFF000000; //LPC_SWM->PINASSIGN[8] |= (pin << 24); switch(obj->out_ch){ case 0: LPC_SWM->PINASSIGN[8] &= ~0xFF000000; LPC_SWM->PINASSIGN[8] |= (pin << 24); break; case 1: LPC_SWM->PINASSIGN[9] &= ~0x000000FF; LPC_SWM->PINASSIGN[9] |= (pin ); break; case 2: LPC_SWM->PINASSIGN[9] &= ~0x0000FF00; LPC_SWM->PINASSIGN[9] |= (pin << 8); break; case 3: LPC_SWM->PINENABLE1 &= ~(1 << 15); break; case 4: LPC_SWM->PINENABLE1 &= ~(1 << 16); break; } break; case 3: // SCT3_OUT0 //LPC_SWM->PINASSIGN[9] &= ~0x00FF0000; //LPC_SWM->PINASSIGN[9] |= (pin << 16); switch(obj->out_ch){ case 0: LPC_SWM->PINASSIGN[9] &= ~0x00FF0000; LPC_SWM->PINASSIGN[9] |= (pin << 16); break; case 1: LPC_SWM->PINASSIGN[9] &= ~0xFF000000; LPC_SWM->PINASSIGN[9] |= (pin )<<24; break; case 2: LPC_SWM->PINASSIGN[10] &= ~0x000000FF; LPC_SWM->PINASSIGN[10] |= (pin ); break; case 3: LPC_SWM->PINENABLE1 &= ~(1 << 18); break; } break; default: break; } // Unified 32-bit counter, autolimit pwm->CONFIG |= ((0x3 << 17) | 0x01); // halt and clear the counter pwm->CTRL |= (1 << 2) | (1 << 3); // System Clock -> us_ticker (1)MHz pwm->CTRL &= ~(0x7F << 5); pwm->CTRL |= (((SystemCoreClock/1000000 - 1) & 0x7F) << 5); // Match reload register pwm->MATCHREL0 = 20000; // 20ms //pwm->MATCHREL1 = (pwm->MATCHREL0 / 4); // 50% duty switch(obj->out_ch){ case 0: pwm->MATCHREL1 = (pwm->MATCHREL0 / 4); break; case 1: pwm->MATCHREL2 = (pwm->MATCHREL0 / 4); break; case 2: pwm->MATCHREL3 = (pwm->MATCHREL0 / 4); break; case 3: pwm->MATCHREL4 = (pwm->MATCHREL0 / 4); break; case 4: pwm->MATCHREL5 = (pwm->MATCHREL0 / 4); break; case 5: pwm->MATCHREL6 = (pwm->MATCHREL0 / 4); break; case 6: pwm->MATCHREL7 = (pwm->MATCHREL0 / 4); break; } //pwm->OUT0_SET = (1 << 0); // event 0 //pwm->OUT0_CLR = (1 << 1); // event 1 switch(obj->out_ch){ case 0: pwm->OUT0_SET = (1 << 0); // event 0 break; case 1: pwm->OUT1_SET = (1 << 0); // event 0 break; case 2: pwm->OUT2_SET = (1 << 0); // event 0 break; case 3: pwm->OUT3_SET = (1 << 0); // event 0 break; case 4: pwm->OUT4_SET = (1 << 0); // event 0 break; case 5: pwm->OUT5_SET = (1 << 0); // event 0 break; case 6: pwm->OUT6_SET = (1 << 0); // event 0 break; } switch(obj->out_ch){ case 0: pwm->OUT0_CLR = (1 << 1); // event 1 break; case 1: pwm->OUT1_CLR = (1 << 2); // event 2 break; case 2: pwm->OUT2_CLR = (1 << 3); // event 3 break; case 3: pwm->OUT3_CLR = (1 << 4); // event 4 break; case 4: pwm->OUT4_CLR = (1 << 5); // event 5 break; case 5: pwm->OUT5_CLR = (1 << 6); // event 6 break; case 6: pwm->OUT6_CLR = (1 << 7); // event 7 break; } pwm->EV0_CTRL = (1 << 12); pwm->EV0_STATE = 0xFFFFFFFF; //pwm->EV1_CTRL = (1 << 12) | (1 << 0); //pwm->EV1_STATE = 0xFFFFFFFF; switch(obj->out_ch){ case 0: pwm->EV1_CTRL = (1 << 12) | (1); pwm->EV1_STATE = 0xFFFFFFFF; // event 1 break; case 1: pwm->EV2_CTRL = (1 << 12) | (2); pwm->EV2_STATE = 0xFFFFFFFF; // event 2 break; case 2: pwm->EV3_CTRL = (1 << 12) | (3); pwm->EV3_STATE = 0xFFFFFFFF; // event 3 break; case 3: pwm->EV4_CTRL = (1 << 12) | (4); pwm->EV4_STATE = 0xFFFFFFFF; // event 4 break; case 4: pwm->EV5_CTRL = (1 << 12) | (5); pwm->EV5_STATE = 0xFFFFFFFF; // event 5 break; case 5: pwm->EV6_CTRL = (1 << 12) | (6); pwm->EV6_STATE = 0xFFFFFFFF; // event 6 break; case 6: pwm->EV7_CTRL = (1 << 12) | (7); pwm->EV7_STATE = 0xFFFFFFFF; // event 6 break; } // unhalt the counter: // - clearing bit 2 of the CTRL register pwm->CTRL &= ~(1 << 2); // default to 20ms: standard for servos, and fine for e.g. brightness control pwmout_period_ms(obj, 20); pwmout_write (obj, 0.5); } void pwmout_free(pwmout_t* obj) { // Disable the SCT clock LPC_SYSCON->SYSAHBCLKCTRL1 &= ~(1 << (obj->pwm_ch + 2)); sct_used &= ~(1 << obj->pwm_ch); } void pwmout_write(pwmout_t* obj, float value) { LPC_SCT0_Type* pwm = obj->pwm; if (value < 0.0f) { value = 0.0; } else if (value > 1.0f) { value = 1.0; } uint32_t t_on = (uint32_t)((float)(pwm->MATCHREL0) * value); //pwm->MATCHREL1 = t_on; switch(obj->out_ch){ case 0: pwm->MATCHREL1 = t_on; break; case 1: pwm->MATCHREL2 = t_on; break; case 2: pwm->MATCHREL3 = t_on; break; case 3: pwm->MATCHREL4 = t_on; break; case 4: pwm->MATCHREL5 = t_on; break; case 5: pwm->MATCHREL6 = t_on; break; case 6: pwm->MATCHREL7 = t_on; break; } } float pwmout_read(pwmout_t* obj) { uint32_t t_off = obj->pwm->MATCHREL0; uint32_t t_on = obj->pwm->MATCHREL1; float v = (float)t_on/(float)t_off; return (v > 1.0f) ? (1.0f) : (v); } 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) { LPC_SCT0_Type* pwm = obj->pwm; uint32_t t_off = pwm->MATCHREL0; uint32_t t_on = pwm->MATCHREL1; float v = (float)t_on/(float)t_off; pwm->MATCHREL0 = (uint32_t)us; //pwm->MATCHREL1 = (uint32_t)((float)us * (float)v); switch(obj->out_ch){ case 0: pwm->MATCHREL1 = (uint32_t)((float)us * (float)v); break; case 1: pwm->MATCHREL2 = (uint32_t)((float)us * (float)v); break; case 2: pwm->MATCHREL3 = (uint32_t)((float)us * (float)v); break; case 3: pwm->MATCHREL4 = (uint32_t)((float)us * (float)v); break; case 4: pwm->MATCHREL5 = (uint32_t)((float)us * (float)v); break; case 5: pwm->MATCHREL6 = (uint32_t)((float)us * (float)v); break; case 6: pwm->MATCHREL7 = (uint32_t)((float)us * (float)v); break; } } 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->pwm->MATCHREL1 = (uint32_t)us; switch(obj->out_ch){ case 0: obj->pwm->MATCHREL1 = (uint32_t)us; break; case 1: obj->pwm->MATCHREL2 = (uint32_t)us; break; case 2: obj->pwm->MATCHREL3 = (uint32_t)us; break; case 3: obj->pwm->MATCHREL4 = (uint32_t)us; break; case 4: obj->pwm->MATCHREL5 = (uint32_t)us; break; case 5: obj->pwm->MATCHREL6 = (uint32_t)us; break; case 6: obj->pwm->MATCHREL7 = (uint32_t)us; break; } }