From cff706e3ca3823ffb388a4e87c4ef8bf925945c4 Mon Sep 17 00:00:00 2001 From: Fergus Noble Date: Thu, 15 Sep 2011 01:20:45 -0700 Subject: Rename F1 examples folder. --- examples/stm32/other/dma_mem2mem/dma.c | 133 --------------------------------- 1 file changed, 133 deletions(-) delete mode 100644 examples/stm32/other/dma_mem2mem/dma.c (limited to 'examples/stm32/other/dma_mem2mem/dma.c') diff --git a/examples/stm32/other/dma_mem2mem/dma.c b/examples/stm32/other/dma_mem2mem/dma.c deleted file mode 100644 index e43fe0d..0000000 --- a/examples/stm32/other/dma_mem2mem/dma.c +++ /dev/null @@ -1,133 +0,0 @@ -/* - * This file is part of the libopencm3 project. - * - * Copyright (C) 2010 Thomas Otto - * - * This program is free software: you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation, either version 3 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program. If not, see . - */ - -#include -#include -#include -#include -#include - -void usart_setup(void) -{ - /* Enable clocks for GPIO port A (for GPIO_USART1_TX) and USART1. */ - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPAEN); - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN); - - /* Setup GPIO pin GPIO_USART1_TX/GPIO9 on GPIO port A for transmit. */ - gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ, - GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_USART1_TX); - - /* Setup UART parameters. */ - usart_set_baudrate(USART1, 115200); - usart_set_databits(USART1, 8); - usart_set_stopbits(USART1, USART_STOPBITS_1); - usart_set_mode(USART1, USART_MODE_TX_RX); - usart_set_parity(USART1, USART_PARITY_NONE); - usart_set_flow_control(USART1, USART_FLOWCONTROL_NONE); - - /* Finally enable the USART. */ - usart_enable(USART1); -} - -void gpio_setup(void) -{ - /* Enable GPIOB clock. */ - rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_IOPBEN); - - /* Set GPIO6/7 (in GPIO port B) to 'output push-pull' for the LEDs. */ - gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, - GPIO_CNF_OUTPUT_PUSHPULL, GPIO6); - gpio_set_mode(GPIOB, GPIO_MODE_OUTPUT_2_MHZ, - GPIO_CNF_OUTPUT_PUSHPULL, GPIO7); -} - -void my_usart_print_string(u32 usart, char * s) -{ - while (*s != 0) { - usart_send(usart, *s); - s++; - } -} - -int main(void) -{ - /* Exactly 20 bytes including '0' at the end. - We want to transfer 32bit * 5 so it should fit */ - char s1[20] = "Hello STM MEM2MEM\r\n"; - char s2[20]; - - rcc_clock_setup_in_hse_16mhz_out_72mhz(); - gpio_setup(); - usart_setup(); - - gpio_clear(GPIOB, GPIO7); /* LED1 on */ - gpio_set(GPIOB, GPIO6); /* LED2 off */ - - my_usart_print_string(USART1, "s1 "); - my_usart_print_string(USART1, s1); - - rcc_peripheral_enable_clock(&RCC_AHBENR, RCC_AHBENR_DMA1EN); - - /* MEM2MEM mode for channel 1. */ - dma_enable_mem2mem_mode(DMA1, DMA_CHANNEL1); - - /* Highest priority. */ - dma_set_priority(DMA1, DMA_CHANNEL1, DMA_CCR1_PL_VERY_HIGH); - - /* 32Bit wide transfer for source and destination. */ - dma_set_memory_size(DMA1, DMA_CHANNEL1, DMA_CCR1_MSIZE_32BIT); - dma_set_peripheral_size(DMA1, DMA_CHANNEL1, DMA_CCR1_PSIZE_32BIT); - - /* After each 32Bit we have to increase the addres because we use RAM. */ - dma_enable_memory_increment_mode(DMA1, DMA_CHANNEL1); - dma_enable_peripheral_increment_mode(DMA1, DMA_CHANNEL1); - - /* We define the source as peripheral. */ - dma_set_read_from_peripheral(DMA1, DMA_CHANNEL1); - - /* We want to transfer string s1. */ - dma_set_peripheral_address(DMA1, DMA_CHANNEL1, (u32) &s1); - - /* Destination should be string s2. */ - dma_set_memory_address(DMA1, DMA_CHANNEL1, (u32) &s2); - - /* Set number of DATA to transfer. - Remember that this means not necessary bytes but MSIZE or PSIZE - depending from your source device. */ - dma_set_number_of_data(DMA1, DMA_CHANNEL1, 5); - - /* Start DMA transfer. */ - dma_enable_channel(DMA1, DMA_CHANNEL1); - - /* TODO: write a function to get the interrupt flags. */ - while(!(DMA_ISR(DMA1) & 0x0000001)) - { - } - - dma_disable_channel(DMA1, DMA_CHANNEL1); - - /* String s1 should now already be transferred to s2. */ - my_usart_print_string(USART1, "s2 "); - my_usart_print_string(USART1, s2); - - gpio_clear(GPIOB, GPIO6); /* LED2 on */ - while(1); /* Halt. */ - - return 0; -} -- cgit v1.2.3