240 lines
6.5 KiB
C
240 lines
6.5 KiB
C
/**
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*******************************************************************************
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* Copyright (c) 2021 Nanjing Qinheng Microelectronics Co., Ltd.
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* All rights reserved.
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*
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* This software component is licensed by WCH under BSD 3-Clause license,
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* the "License"; You may not use this file except in compliance with the
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* License. You may obtain a copy of the License at:
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* opensource.org/licenses/BSD-3-Clause
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*
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*******************************************************************************
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*/
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#include "pins_arduino.h"
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#include "mik32_hal_adc.h"
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#include "wiring_analog.h"
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#include "wiring_LL.h"
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/**
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* @brief Determines the address of the port by the board pin number to which this pin belongs on the MCU
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* @return The address of the port corresponding to the board pin number. Can return 0 if the pin not exists
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*/
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__attribute__((noinline, section(".ram_text"))) GPIO_TypeDef *digitalPinToPort(uint32_t digitalPinNumber)
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{
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if (digitalPinNumber >= pinCommonQty())
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{
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ErrorMsgHandler("digitalPinToPort(): pin number exceeds the total number of pins");
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return NULL;
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}
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if (digitalPinNumber <= P0_15)
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return GPIO_0;
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else if ((digitalPinNumber >= P1_0) && (digitalPinNumber <= P1_15))
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return GPIO_1;
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else if ((digitalPinNumber >= P2_6) && (digitalPinNumber < PINS_COMMON_QTY))
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return GPIO_2;
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else
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return NULL;
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}
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// determines the pin address inside the port by the board pin number
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__attribute__((noinline, section(".ram_text"))) HAL_PinsTypeDef digitalPinToBitMask(uint32_t digitalPinNumber)
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{
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if (digitalPinNumber >= PINS_COMMON_QTY)
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{
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ErrorMsgHandler("digitalPinToBitMask(): pin number exceeds the total number of pins");
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return NC;
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}
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if (digitalPinNumber >= P2_6)
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return (HAL_PinsTypeDef)(1 << ((digitalPinNumber+6) & 0xF));
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else
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return (HAL_PinsTypeDef)(1 << (digitalPinNumber & 0xF));
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}
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// the function returns a reference to the OUTPUT address of the GPIO register
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volatile uint32_t *portOutputRegister(GPIO_TypeDef *GPIO_x)
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{
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return &GPIO_x->OUTPUT_;
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}
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// the function returns a reference to the STATE address of the GPIO register
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volatile uint32_t *portInputRegister(GPIO_TypeDef *GPIO_x)
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{
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return &GPIO_x->STATE;
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}
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// ---------------------- ADC ---------------------- //
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// determines the ADC channel number by the board pin number
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uint32_t analogInputToChannelNumber(uint32_t PinNumber)
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{
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uint32_t adcChannel = 0;
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switch (PinNumber)
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{
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case PIN_A0:
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adcChannel = ADC_CHANNEL0;
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break;
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case PIN_A1:
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adcChannel = ADC_CHANNEL1;
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break;
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case PIN_A2:
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adcChannel = ADC_CHANNEL2;
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break;
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case PIN_A3:
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adcChannel = ADC_CHANNEL3;
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break;
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case PIN_A4:
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adcChannel = ADC_CHANNEL4;
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break;
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case PIN_A5:
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adcChannel = ADC_CHANNEL5;
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break;
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case PIN_A6:
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adcChannel = ADC_CHANNEL6;
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break;
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case PIN_A7:
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adcChannel = ADC_CHANNEL7;
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break;
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default:
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adcChannel = NC;
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}
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return adcChannel;
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}
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// ---------------------- PWM ---------------------- //
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// use only if digitalPinHasPWM() == true
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#define PWM_PIN_TO_PORT_NUMBER(pin) (((pin) & 16) ? 1 : 0)
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// use only if digitalPinHasPWM() == true
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// return true if digitalPin configured as pwm
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bool digitalPinPwmIsOn(uint8_t digitalPin)
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{
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if (digitalPinHasPWM(digitalPin))
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{
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uint8_t config = 0;
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uint8_t pinShift = digitalPin & 0x3;
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if (PWM_PIN_TO_PORT_NUMBER(digitalPin) == 0)
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config = PIN_GET_PAD_CONFIG(PORT_0_CFG, pinShift);
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else
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config = PIN_GET_PAD_CONFIG(PORT_1_CFG, pinShift);
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if (config == 2)
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return true;
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}
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return false;
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}
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// function is used only if digitalPinHasPWM() is true
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TIMER32_TypeDef *pwmPinToTimer(uint32_t digPinNumber)
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{
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if (digPinNumber <= P0_15)
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return TIMER32_1;
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else if ((digPinNumber >= P1_0) && (digPinNumber <= P1_15))
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return TIMER32_2;
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else
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return NULL;
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}
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// function is used only if digitalPinHasPWM() is true
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HAL_TIMER32_CHANNEL_IndexTypeDef pwmPinToTimerChannel(uint32_t digPinNumber)
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{
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switch (digPinNumber & 0x3)
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{
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case 0:
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return TIMER32_CHANNEL_0;
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case 1:
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return TIMER32_CHANNEL_1;
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case 2:
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return TIMER32_CHANNEL_2;
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case 3:
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return TIMER32_CHANNEL_3;
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default:
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return 255;
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}
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}
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// ---------------------- interrupts ---------------------- //
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// interrupt table is stored in ram to improve performance
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// index = interrupt number. In each row {digitalPinNumber, IntLineValue, IntMuxValue}
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uint8_t interruptInfo[EXTERNAL_INTERRUPTS_QTY][3] =
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{
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{P0_8, GPIO_LINE_0, GPIO_MUX_LINE_0_PORT0_8}, // INT0
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{P1_4, GPIO_LINE_4, GPIO_MUX_LINE_4_PORT1_4}, // INT1
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{P1_5, GPIO_LINE_5, GPIO_MUX_LINE_5_PORT1_5}, // INT2
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{P1_6, GPIO_LINE_6, GPIO_MUX_LINE_6_PORT1_6}, // INT3
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{P1_9, GPIO_LINE_1, GPIO_MUX_LINE_1_PORT1_9}, // INT4
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{P1_10, GPIO_LINE_2, GPIO_MUX_LINE_2_PORT1_10}, // INT5
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{P1_15, GPIO_LINE_3, GPIO_MUX_LINE_3_PORT1_15}, // INT6
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{P2_7, GPIO_LINE_7, GPIO_MUX_LINE_7_PORT2_7}, // INT7
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};
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int8_t digitalPinToGpioIntMux(uint8_t digPinNumber)
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{
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for (uint8_t i = 0; i < EXTERNAL_INTERRUPTS_QTY; i++)
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{
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if (interruptInfo[i][0] == digPinNumber)
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return interruptInfo[i][2];
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}
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return NOT_AN_INTERRUPT;
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}
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int8_t digitalPinToGpioIntLine(uint8_t digPinNumber)
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{
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for (uint8_t i = 0; i < EXTERNAL_INTERRUPTS_QTY; i++)
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{
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if (interruptInfo[i][0] == digPinNumber)
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return interruptInfo[i][1];
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}
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return NOT_AN_INTERRUPT;
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}
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int8_t gpioIntLineToInterrupt(uint32_t gpioIntLine)
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{
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for (uint8_t i = 0; i < EXTERNAL_INTERRUPTS_QTY; i++)
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{
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if (interruptInfo[i][1] == gpioIntLine)
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return i;
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}
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return NOT_AN_INTERRUPT;
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}
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int8_t digitalPinToInterrupt(uint32_t digPinNumber)
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{
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for (uint8_t i = 0; i < EXTERNAL_INTERRUPTS_QTY; i++)
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{
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if (interruptInfo[i][0] == digPinNumber)
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return i;
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}
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return NOT_AN_INTERRUPT;
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}
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// ---------------------- SPI ---------------------- //
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void spi_onBegin(uint8_t spiNum)
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{
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// On mik32 spi0 needs pin 0.3, spi1 needs pin 1.3 for correct work.
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// This pins also can be used as pwm. If pwm is working when spi begins, we should stop the pwm channel
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// get pin NSS_IN config
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uint8_t config;
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if (spiNum == 1)
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config = PIN_GET_PAD_CONFIG(PORT_1_CFG, PIN_MASK_TO_PIN_NUMBER(GPIO_PIN_3));
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else
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config = PIN_GET_PAD_CONFIG(PORT_0_CFG, PIN_MASK_TO_PIN_NUMBER(GPIO_PIN_3));
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if(config == 2) // timer for pwm
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{
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if (spiNum == 1)
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{
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analogWriteStop(P1_3);
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ErrorMsgHandler("analogWrite(): P1_3 cannot be used as PWM pin while SPI is running");
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}
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else
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{
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analogWriteStop(P0_3);
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ErrorMsgHandler("analogWrite(): P0_3 cannot be used as PWM pin while SPI1 is running");
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}
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}
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} |