| /* |
| * The MIT License (MIT) |
| * |
| * Copyright (c) 2015 David Ogilvy (MetalPhreak) |
| * Modified 2016 by Radomir Dopieralski |
| * |
| * Permission is hereby granted, free of charge, to any person obtaining a copy |
| * of this software and associated documentation files (the "Software"), to deal |
| * in the Software without restriction, including without limitation the rights |
| * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| * copies of the Software, and to permit persons to whom the Software is |
| * furnished to do so, subject to the following conditions: |
| * |
| * The above copyright notice and this permission notice shall be included in all |
| * copies or substantial portions of the Software. |
| * |
| * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| * SOFTWARE. |
| */ |
| |
| #ifndef SPI_APP_H |
| #define SPI_APP_H |
| |
| #include "hspi_register.h" |
| #include "ets_sys.h" |
| #include "osapi.h" |
| #include "os_type.h" |
| |
| // Define SPI hardware modules |
| #define SPI 0 |
| #define HSPI 1 |
| |
| #define SPI_CLK_USE_DIV 0 |
| #define SPI_CLK_80MHZ_NODIV 1 |
| |
| #define SPI_BYTE_ORDER_HIGH_TO_LOW 1 |
| #define SPI_BYTE_ORDER_LOW_TO_HIGH 0 |
| |
| #ifndef CPU_CLK_FREQ //Should already be defined in eagle_soc.h |
| #define CPU_CLK_FREQ (80 * 1000000) |
| #endif |
| |
| // Define some default SPI clock settings |
| #define SPI_CLK_PREDIV 10 |
| #define SPI_CLK_CNTDIV 2 |
| #define SPI_CLK_FREQ (CPU_CLK_FREQ / (SPI_CLK_PREDIV * SPI_CLK_CNTDIV)) |
| // 80 / 20 = 4 MHz |
| |
| void spi_init(uint8_t spi_no); |
| void spi_mode(uint8_t spi_no, uint8_t spi_cpha,uint8_t spi_cpol); |
| void spi_init_gpio(uint8_t spi_no, uint8_t sysclk_as_spiclk); |
| void spi_clock(uint8_t spi_no, uint16_t prediv, uint8_t cntdiv); |
| void spi_tx_byte_order(uint8_t spi_no, uint8_t byte_order); |
| void spi_rx_byte_order(uint8_t spi_no, uint8_t byte_order); |
| uint32_t spi_transaction(uint8_t spi_no, uint8_t cmd_bits, uint16_t cmd_data, |
| uint32_t addr_bits, uint32_t addr_data, |
| uint32_t dout_bits, uint32_t dout_data, |
| uint32_t din_bits, uint32_t dummy_bits); |
| void spi_tx8fast(uint8_t spi_no, uint8_t dout_data); |
| |
| // Expansion Macros |
| #define spi_busy(spi_no) READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR |
| |
| #define spi_txd(spi_no, bits, data) spi_transaction(spi_no, 0, 0, 0, 0, bits, (uint32_t) data, 0, 0) |
| #define spi_tx8(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 8, (uint32_t) data, 0, 0) |
| #define spi_tx16(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 16, (uint32_t) data, 0, 0) |
| #define spi_tx32(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 32, (uint32_t) data, 0, 0) |
| |
| #define spi_rxd(spi_no, bits) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, bits, 0) |
| #define spi_rx8(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 8, 0) |
| #define spi_rx16(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 16, 0) |
| #define spi_rx32(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 32, 0) |
| |
| #endif |