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authorFergus Noble2011-09-15 01:20:45 -0700
committerStephen Caudle2011-10-12 22:13:02 -0400
commitcff706e3ca3823ffb388a4e87c4ef8bf925945c4 (patch)
tree677c4a469da77dff69d91b08f8cbb8b6b529b904 /examples/stm32/other/dma_mem2mem/dma.c
parentce7dd46aef9153c4f98a983977ce7bd2a905134d (diff)
Rename F1 examples folder.
Diffstat (limited to 'examples/stm32/other/dma_mem2mem/dma.c')
-rw-r--r--examples/stm32/other/dma_mem2mem/dma.c133
1 files changed, 0 insertions, 133 deletions
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 <tommi@viadmin.org>
- *
- * 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 <http://www.gnu.org/licenses/>.
- */
-
-#include <libopencm3/stm32/rcc.h>
-#include <libopencm3/stm32/flash.h>
-#include <libopencm3/stm32/gpio.h>
-#include <libopencm3/stm32/usart.h>
-#include <libopencm3/stm32/dma.h>
-
-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;
-}