不韋 呂 / UITDSP_ADDA2

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Dependents:   UITDSP_ADDA_Example2

DAC_MCP4921.cpp@1:e997f4e94491, 2015-03-16 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Mar 16 23:59:49 2015 +0000
Revision:
1:e997f4e94491
Parent:
0:46d099dfd9d6 
2

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 1:e997f4e94491 1 //--------------------------------------------------------------
MikamiUitOpen 1:e997f4e94491 2 // Class for DAC MCP4921
MikamiUitOpen 0:46d099dfd9d6 3 //
MikamiUitOpen 1:e997f4e94491 4 // 2015/02/18, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 1:e997f4e94491 5 //--------------------------------------------------------------
MikamiUitOpen 0:46d099dfd9d6 6
MikamiUitOpen 1:e997f4e94491 7 #include "InterruptManager.h"
MikamiUitOpen 0:46d099dfd9d6 8 #include "DAC_MCP4921.hpp"
MikamiUitOpen 0:46d099dfd9d6 9
MikamiUitOpen 0:46d099dfd9d6 10 namespace Mikami
MikamiUitOpen 0:46d099dfd9d6 11 {
MikamiUitOpen 0:46d099dfd9d6 12 DAC_MCP4921::DAC_MCP4921(PinName mosi, PinName sclk,
MikamiUitOpen 0:46d099dfd9d6 13 PinName cs, PinName ldac)
MikamiUitOpen 1:e997f4e94491 14 : spi_(mosi, NC, sclk), ld_(ldac, 0)
MikamiUitOpen 0:46d099dfd9d6 15 {
MikamiUitOpen 0:46d099dfd9d6 16 if ( (mosi == PA_7) || (mosi == PB_5) ) mySpi_ = SPI1;
MikamiUitOpen 0:46d099dfd9d6 17 if ( (mosi == PB_15) || (mosi == PC_3) ) mySpi_ = SPI2;
MikamiUitOpen 0:46d099dfd9d6 18 if ( mosi == PC_12 ) mySpi_ = SPI3;
MikamiUitOpen 0:46d099dfd9d6 19
MikamiUitOpen 0:46d099dfd9d6 20 // Set SPI format
MikamiUitOpen 0:46d099dfd9d6 21 spi_.format(16, 0);
MikamiUitOpen 0:46d099dfd9d6 22 // Clock source of F401 for SPI1 : 84 MHz,
MikamiUitOpen 0:46d099dfd9d6 23 // SPI2, SPI3 : 42 MHz
MikamiUitOpen 0:46d099dfd9d6 24 mySpi_->CR1 = (mySpi_->CR1 & ~SPI_CR1_BR);
MikamiUitOpen 0:46d099dfd9d6 25 if (mySpi_ == SPI1) mySpi_->CR1 += SPI_CR1_BR_0;
MikamiUitOpen 0:46d099dfd9d6 26 #ifdef __STM32F411xE_H
MikamiUitOpen 0:46d099dfd9d6 27 mySpi_->CR1 += SPI_CR1_BR_0;
MikamiUitOpen 0:46d099dfd9d6 28 #endif // __STM32F411xE_H
MikamiUitOpen 0:46d099dfd9d6 29
MikamiUitOpen 1:e997f4e94491 30 cs_ = new DigitalOut(cs, 1);
MikamiUitOpen 1:e997f4e94491 31
MikamiUitOpen 1:e997f4e94491 32 mySpi_->CR2 |= SPI_CR2_RXNEIE; // Enable SPI RX buffer not empty interrupt
MikamiUitOpen 1:e997f4e94491 33
MikamiUitOpen 1:e997f4e94491 34 IRQn_Type irq = SPI1_IRQn;
MikamiUitOpen 1:e997f4e94491 35 if (mySpi_ == SPI2) irq = SPI2_IRQn;
MikamiUitOpen 1:e997f4e94491 36 if (mySpi_ == SPI3) irq = SPI3_IRQn;
MikamiUitOpen 1:e997f4e94491 37
MikamiUitOpen 1:e997f4e94491 38 NVIC_SetVector(irq, (uint32_t)Isr); // See "cmsis_nvic.h"
MikamiUitOpen 1:e997f4e94491 39 NVIC_EnableIRQ(irq); // See "core_cm4.h"
MikamiUitOpen 0:46d099dfd9d6 40 }
MikamiUitOpen 0:46d099dfd9d6 41
MikamiUitOpen 0:46d099dfd9d6 42 void DAC_MCP4921::ScfClockTim3(uint32_t clock, PinName pin)
MikamiUitOpen 0:46d099dfd9d6 43 {
MikamiUitOpen 0:46d099dfd9d6 44 if ( (pin != PA_6) && (pin != PB_4) && (pin != PB_5) &&
MikamiUitOpen 0:46d099dfd9d6 45 (pin != PC_6) && (pin != PC_7) && (pin != PC_8) && (pin != PC_9) )
MikamiUitOpen 0:46d099dfd9d6 46 {
MikamiUitOpen 1:e997f4e94491 47 fprintf(stderr, "\r\nIllegal pin name in DAC_MCP4922::ScfClockTim3()\r\n");
MikamiUitOpen 0:46d099dfd9d6 48 while (true) {}
MikamiUitOpen 0:46d099dfd9d6 49 }
MikamiUitOpen 0:46d099dfd9d6 50
MikamiUitOpen 0:46d099dfd9d6 51 PwmOut clockSCF(pin);
MikamiUitOpen 0:46d099dfd9d6 52
MikamiUitOpen 0:46d099dfd9d6 53 TIM3->ARR = SystemCoreClock/clock - 1;
MikamiUitOpen 0:46d099dfd9d6 54 TIM3->PSC = 0;
MikamiUitOpen 0:46d099dfd9d6 55 // Set capture/compare register 2
MikamiUitOpen 0:46d099dfd9d6 56 if ( (pin == PA_6) || (pin == PB_4) || (pin == PC_6) )
MikamiUitOpen 0:46d099dfd9d6 57 TIM3->CCR1 = (TIM3->ARR + 1)/2;
MikamiUitOpen 0:46d099dfd9d6 58 if ( (pin == PB_5) || (pin == PC_7) )
MikamiUitOpen 0:46d099dfd9d6 59 TIM3->CCR2 = (TIM3->ARR + 1)/2;
MikamiUitOpen 0:46d099dfd9d6 60 if (pin == PC_8)
MikamiUitOpen 0:46d099dfd9d6 61 TIM3->CCR3 = (TIM3->ARR + 1)/2;
MikamiUitOpen 0:46d099dfd9d6 62 if (pin == PC_9)
MikamiUitOpen 0:46d099dfd9d6 63 TIM3->CCR4 = (TIM3->ARR + 1)/2;
MikamiUitOpen 0:46d099dfd9d6 64 }
MikamiUitOpen 1:e997f4e94491 65
MikamiUitOpen 1:e997f4e94491 66 DigitalOut* DAC_MCP4921::cs_;
MikamiUitOpen 1:e997f4e94491 67 SPI_TypeDef* DAC_MCP4921::mySpi_;
MikamiUitOpen 0:46d099dfd9d6 68 }
MikamiUitOpen 1:e997f4e94491 69