example: add spi_master

Signed-off-by: liangkangnan <liangkangnan@163.com>
pull/1/head
liangkangnan 2020-05-05 18:35:33 +08:00
parent 86392aa607
commit 038168c8f2
7 changed files with 1231 additions and 0 deletions

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@ -19,6 +19,8 @@ C_SRCS += $(COMMON_DIR)/init.c
C_SRCS += $(COMMON_DIR)/lib/utils.c C_SRCS += $(COMMON_DIR)/lib/utils.c
C_SRCS += $(COMMON_DIR)/lib/xprintf.c C_SRCS += $(COMMON_DIR)/lib/xprintf.c
C_SRCS += $(COMMON_DIR)/lib/uart.c C_SRCS += $(COMMON_DIR)/lib/uart.c
C_SRCS += $(COMMON_DIR)/lib/flash_n25q.c
C_SRCS += $(COMMON_DIR)/lib/spi.c
LINKER_SCRIPT := $(COMMON_DIR)/link.lds LINKER_SCRIPT := $(COMMON_DIR)/link.lds

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@ -0,0 +1,21 @@
RISCV_ARCH := rv32im
RISCV_ABI := ilp32
RISCV_MCMODEL := medlow
TARGET = spi_master
#CFLAGS += -DSIMULATION
#CFLAGS += -Os
#ASM_SRCS +=
#LDFLAGS +=
#INCLUDES += -I.
C_SRCS := \
main.c \
COMMON_DIR = ..
TOOLCHAIN_DIR = ../../..
include ../common.mk

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@ -0,0 +1 @@
SPI norflash例程。

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@ -0,0 +1,47 @@
#include <stdint.h>
#include "../include/uart.h"
#include "../include/flash_n25q.h"
#include "../include/xprintf.h"
uint8_t id_data[3];
uint8_t program_data[N25Q_PAGE_SIZE];
uint8_t read_data[N25Q_PAGE_SIZE];
int main()
{
// 初始化串口
uart_init();
// 初始化N25Q flash
n25q_init();
// 读N25Q ID号
n25q_read_id(id_data, 3);
xprintf("manu id = 0x%x\n", id_data[0]);
xprintf("device id = 0x%x, 0x%x\n", id_data[1], id_data[2]);
uint16_t i;
// 初始化要编程的数据
for (i = 0; i < N25Q_PAGE_SIZE; i++)
program_data[i] = 0x55;
xprintf("start erase subsector...\n");
// 擦除第0个子扇区
n25q_subsector_erase(0x00);
xprintf("start program page...\n");
// 编程第1页
n25q_page_program(program_data, N25Q_PAGE_SIZE, 0x01);
xprintf("start read page...\n");
// 读第1页
n25q_read_data(read_data, N25Q_PAGE_SIZE, N25Q_PAGE_TO_ADDR(1));
xprintf("read data: \n");
// 打印读出来的数据
for (i = 0; i < N25Q_PAGE_SIZE; i++)
xprintf("0x%x\n", read_data[i]);
while (1);
}

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