不韋 呂 / UIT_ADDA

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Dependents:   UIT2_MovingAverage UIT2_AllpassReverb UIT2_CombReverb UIT2_FIR_LPF_Symmetry ... more

DAC_MCP4921.cpp@20:c49f3b565a87, 2015-02-02 (annotated)

Committer:
MikamiUitOpen
Date:
Mon Feb 02 08:10:55 2015 +0000
Revision:
20:c49f3b565a87
21

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 20:c49f3b565a87 1 //------------------------------------------------------
MikamiUitOpen 20:c49f3b565a87 2 // Class for single DAC in MCP4921
MikamiUitOpen 20:c49f3b565a87 3 //
MikamiUitOpen 20:c49f3b565a87 4 // 2015/02/02, Copyright (c) 2015 MIKAMI, Naoki
MikamiUitOpen 20:c49f3b565a87 5 //------------------------------------------------------
MikamiUitOpen 20:c49f3b565a87 6
MikamiUitOpen 20:c49f3b565a87 7 #include "DAC_MCP4921.hpp"
MikamiUitOpen 20:c49f3b565a87 8
MikamiUitOpen 20:c49f3b565a87 9 namespace Mikami
MikamiUitOpen 20:c49f3b565a87 10 {
MikamiUitOpen 20:c49f3b565a87 11 DAC_MCP4921::DAC_MCP4921(PinName mosi, PinName sclk,
MikamiUitOpen 20:c49f3b565a87 12 PinName cs, PinName ldac)
MikamiUitOpen 20:c49f3b565a87 13 : spi_(mosi, NC, sclk),
MikamiUitOpen 20:c49f3b565a87 14 ld_(ldac, 0), mySpi_((SPI_TypeDef*)NULL)
MikamiUitOpen 20:c49f3b565a87 15 {
MikamiUitOpen 20:c49f3b565a87 16 if ( (mosi == PA_7) || (mosi == PB_5) ) mySpi_ = SPI1;
MikamiUitOpen 20:c49f3b565a87 17 if ( (mosi == PB_15) || (mosi == PC_3) ) mySpi_ = SPI2;
MikamiUitOpen 20:c49f3b565a87 18 if ( mosi == PC_12 ) mySpi_ = SPI3;
MikamiUitOpen 20:c49f3b565a87 19
MikamiUitOpen 20:c49f3b565a87 20 // Set SPI format
MikamiUitOpen 20:c49f3b565a87 21 spi_.format(16, 0);
MikamiUitOpen 20:c49f3b565a87 22 // Clock source of F401 for SPI1 : 84 MHz,
MikamiUitOpen 20:c49f3b565a87 23 // SPI2, SPI3 : 42 MHz
MikamiUitOpen 20:c49f3b565a87 24 mySpi_->CR1 = (mySpi_->CR1 & ~SPI_CR1_BR);
MikamiUitOpen 20:c49f3b565a87 25 if (mySpi_ == SPI1) mySpi_->CR1 += SPI_CR1_BR_0;
MikamiUitOpen 20:c49f3b565a87 26 #ifdef __STM32F411xE_H
MikamiUitOpen 20:c49f3b565a87 27 mySpi_->CR1 += SPI_CR1_BR_0;
MikamiUitOpen 20:c49f3b565a87 28 #endif // __STM32F411xE_H
MikamiUitOpen 20:c49f3b565a87 29
MikamiUitOpen 20:c49f3b565a87 30 // timer prescaler is set same value of boud rate for SPI
MikamiUitOpen 20:c49f3b565a87 31 uint16_t psc = (2 << ((mySpi_->CR1 >> 3) & 0x07)) - 1;
MikamiUitOpen 20:c49f3b565a87 32 if (mySpi_ != SPI1) psc = (psc + 1)*2 - 1;
MikamiUitOpen 20:c49f3b565a87 33 ss_ = new Tim4_ss(psc, 19, cs);
MikamiUitOpen 20:c49f3b565a87 34 }
MikamiUitOpen 20:c49f3b565a87 35
MikamiUitOpen 20:c49f3b565a87 36 void DAC_MCP4921::ScfClockTim3(uint32_t clock, PinName pin)
MikamiUitOpen 20:c49f3b565a87 37 {
MikamiUitOpen 20:c49f3b565a87 38 if ( (pin != PA_6) && (pin != PB_4) && (pin != PB_5) &&
MikamiUitOpen 20:c49f3b565a87 39 (pin != PC_6) && (pin != PC_7) && (pin != PC_8) && (pin != PC_9) )
MikamiUitOpen 20:c49f3b565a87 40 {
MikamiUitOpen 20:c49f3b565a87 41 fprintf(stderr, "\r\nIllegal pin name in DAC_MCP4921::ScfClockTim3()\r\n");
MikamiUitOpen 20:c49f3b565a87 42 while (true) {}
MikamiUitOpen 20:c49f3b565a87 43 }
MikamiUitOpen 20:c49f3b565a87 44
MikamiUitOpen 20:c49f3b565a87 45 PwmOut clockSCF(pin);
MikamiUitOpen 20:c49f3b565a87 46
MikamiUitOpen 20:c49f3b565a87 47 TIM3->ARR = SystemCoreClock/clock - 1;
MikamiUitOpen 20:c49f3b565a87 48 TIM3->PSC = 0;
MikamiUitOpen 20:c49f3b565a87 49 // Set capture/compare register 2
MikamiUitOpen 20:c49f3b565a87 50 if ( (pin == PA_6) || (pin == PB_4) || (pin == PC_6) )
MikamiUitOpen 20:c49f3b565a87 51 TIM3->CCR1 = (TIM3->ARR + 1)/2;
MikamiUitOpen 20:c49f3b565a87 52 if ( (pin == PB_5) || (pin == PC_7) )
MikamiUitOpen 20:c49f3b565a87 53 TIM3->CCR2 = (TIM3->ARR + 1)/2;
MikamiUitOpen 20:c49f3b565a87 54 if (pin == PC_8)
MikamiUitOpen 20:c49f3b565a87 55 TIM3->CCR3 = (TIM3->ARR + 1)/2;
MikamiUitOpen 20:c49f3b565a87 56 if (pin == PC_9)
MikamiUitOpen 20:c49f3b565a87 57 TIM3->CCR4 = (TIM3->ARR + 1)/2;
MikamiUitOpen 20:c49f3b565a87 58 }
MikamiUitOpen 20:c49f3b565a87 59 }