The program demonstrates how to implement SPI on RedBearLab nRF51822 platform
Dependencies: mbed
main.cpp
00001 /* 00002 00003 Copyright (c) 2012-2014 RedBearLab 00004 00005 Permission is hereby granted, free of charge, to any person obtaining a copy of this software 00006 and associated documentation files (the "Software"), to deal in the Software without restriction, 00007 including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 00008 and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 00009 subject to the following conditions: 00010 The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. 00011 00012 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 00013 INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR 00014 PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 00015 FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 00016 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 00017 00018 */ 00019 00020 #include "mbed.h" 00021 #include "spi_master.h" 00022 00023 DigitalOut spi_cs(P0_14);//D10 00024 00025 SPIClass SPI1(NRF_SPI1); 00026 00027 //SPI spi(P0_20, P0_22, P0_25);//MOSI, MISO, SCLK 00028 //SPI spi(P0_12, P0_13, P0_15);//D11, D12, D13 00029 00030 00031 00032 Serial pc(USBTX, USBRX); 00033 00034 void Flash_Buff_WriteBytes(uint16_t addr, uint8_t *pbuf, uint16_t len) 00035 { 00036 uint16_t index; 00037 00038 spi_cs = 0; 00039 wait_us(200); 00040 00041 SPI1.transfer(0x84); 00042 SPI1.transfer(0x00); 00043 SPI1.transfer((uint8_t)(addr>>8)); 00044 SPI1.transfer((uint8_t)addr); 00045 for(index=0; index<len; index++) 00046 { 00047 SPI1.transfer(*pbuf); 00048 pbuf++; 00049 } 00050 00051 wait_us(200); 00052 spi_cs = 1; 00053 } 00054 00055 void Flash_Buff_ReadBytes(uint16_t addr, uint8_t *pbuf, uint16_t len) 00056 { 00057 uint16_t index; 00058 00059 spi_cs = 0; 00060 wait_us(200); 00061 00062 SPI1.transfer(0xD1); 00063 SPI1.transfer(0x00); 00064 SPI1.transfer((uint8_t)(addr>>8)); 00065 SPI1.transfer((uint8_t)addr); 00066 for(index=0; index<len; index++) 00067 { 00068 *pbuf = SPI1.transfer(0x00); 00069 pbuf++; 00070 } 00071 00072 wait_us(200); 00073 spi_cs = 1; 00074 } 00075 00076 uint8_t i; 00077 uint8_t wt_buf[7] = {'H','e','l','l', 'o', '\r', '\n'}; 00078 uint8_t rd_buf[7]; 00079 00080 int main(void) 00081 { 00082 pc.baud(9600); 00083 wait(8); 00084 spi_cs = 1; 00085 pc.printf("SPI Demo Start \r\n"); 00086 00087 //SPI1.begin(); 00088 SPI1.begin(P0_15, P0_12, P0_13); 00089 00090 wait(1); 00091 Flash_Buff_WriteBytes(0, wt_buf, 7); 00092 while(1) 00093 { 00094 memset(rd_buf, 0x00, 7); 00095 Flash_Buff_ReadBytes(0, rd_buf, 7); 00096 for(i=0; i<7; i++) 00097 pc.putc(rd_buf[i]); 00098 wait(1); 00099 } 00100 } 00101 00102 00103 00104 00105 00106 00107 00108
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