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56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* geany_encoding=koi8-r
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* hardware.c - hardware-dependent macros & functions
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*
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* Copyright 2018 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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* MA 02110-1301, USA.
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*
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*/
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#include "hardware.h"
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#include "spi.h"
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static inline void gpio_setup(){
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// Enable clocks to the GPIO subsystems, turn on AFIO clocking to disable SWD/JTAG
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RCC->APB2ENR |= RCC_APB2ENR_IOPAEN | RCC_APB2ENR_IOPBEN | RCC_APB2ENR_IOPCEN | RCC_APB2ENR_AFIOEN;
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// turn off USB pullup
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GPIOA->ODR = (1<<15);
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// Set led as opendrain output
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GPIOC->CRH = CRH(13, CNF_ODOUTPUT|MODE_SLOW);
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// USB pullup (PA15) - opendrain output
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// SCREEN PINs: A,B - PB6,PB7; SCLK - PA6; nOE - PA13
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GPIOA->CRH = CRH(15, CNF_PPOUTPUT|MODE_SLOW);// | CRH(13, CNF_PPOUTPUT|MODE_SLOW);
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// turn off SWJ/JTAG (PA13 is in use)
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// AFIO->MAPR = AFIO_MAPR_SWJ_CFG_DISABLE;
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GPIOB->CRL = CRL(6, CNF_PPOUTPUT|MODE_SLOW) | CRL(7, CNF_PPOUTPUT|MODE_SLOW);
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GPIOA->CRL = CRL(6, CNF_PPOUTPUT|MODE_SLOW) | CRL(4, CNF_PPOUTPUT|MODE_SLOW);
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}
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void hw_setup(){
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gpio_setup();
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spi_setup();
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}
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// SPI1 DMA Tx interrupt
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void dma1_channel3_isr(){
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if(DMA1->ISR & DMA_ISR_TCIF3){
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DMA1->IFCR |= DMA_IFCR_CTCIF3; /* Clear TC flag */
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SPI_status = SPI_READY;
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DMA_SPI_Channel->CCR &=~ DMA_CCR_EN; // turn off DMA for further reconfiguration
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}
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}
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