| Radomir Dopieralski | 8e7dfea | 2016-06-07 21:40:56 +0200 | [diff] [blame^] | 1 | /* |
| 2 | * The MIT License (MIT) |
| 3 | * |
| 4 | * Copyright (c) 2015 David Ogilvy (MetalPhreak) |
| 5 | * Modified 2016 by Radomir Dopieralski |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 8 | * of this software and associated documentation files (the "Software"), to deal |
| 9 | * in the Software without restriction, including without limitation the rights |
| 10 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 11 | * copies of the Software, and to permit persons to whom the Software is |
| 12 | * furnished to do so, subject to the following conditions: |
| 13 | * |
| 14 | * The above copyright notice and this permission notice shall be included in all |
| 15 | * copies or substantial portions of the Software. |
| 16 | * |
| 17 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 18 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 19 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 20 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 21 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 22 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE |
| 23 | * SOFTWARE. |
| 24 | */ |
| 25 | |
| 26 | #ifndef SPI_APP_H |
| 27 | #define SPI_APP_H |
| 28 | |
| 29 | #include "hspi_register.h" |
| 30 | #include "ets_sys.h" |
| 31 | #include "osapi.h" |
| 32 | #include "os_type.h" |
| 33 | |
| 34 | // Define SPI hardware modules |
| 35 | #define SPI 0 |
| 36 | #define HSPI 1 |
| 37 | |
| 38 | #define SPI_CLK_USE_DIV 0 |
| 39 | #define SPI_CLK_80MHZ_NODIV 1 |
| 40 | |
| 41 | #define SPI_BYTE_ORDER_HIGH_TO_LOW 1 |
| 42 | #define SPI_BYTE_ORDER_LOW_TO_HIGH 0 |
| 43 | |
| 44 | #ifndef CPU_CLK_FREQ //Should already be defined in eagle_soc.h |
| 45 | #define CPU_CLK_FREQ (80 * 1000000) |
| 46 | #endif |
| 47 | |
| 48 | // Define some default SPI clock settings |
| 49 | #define SPI_CLK_PREDIV 10 |
| 50 | #define SPI_CLK_CNTDIV 2 |
| 51 | #define SPI_CLK_FREQ (CPU_CLK_FREQ / (SPI_CLK_PREDIV * SPI_CLK_CNTDIV)) |
| 52 | // 80 / 20 = 4 MHz |
| 53 | |
| 54 | void spi_init(uint8_t spi_no); |
| 55 | void spi_mode(uint8_t spi_no, uint8_t spi_cpha,uint8_t spi_cpol); |
| 56 | void spi_init_gpio(uint8_t spi_no, uint8_t sysclk_as_spiclk); |
| 57 | void spi_clock(uint8_t spi_no, uint16_t prediv, uint8_t cntdiv); |
| 58 | void spi_tx_byte_order(uint8_t spi_no, uint8_t byte_order); |
| 59 | void spi_rx_byte_order(uint8_t spi_no, uint8_t byte_order); |
| 60 | uint32_t spi_transaction(uint8_t spi_no, uint8_t cmd_bits, uint16_t cmd_data, |
| 61 | uint32_t addr_bits, uint32_t addr_data, |
| 62 | uint32_t dout_bits, uint32_t dout_data, |
| 63 | uint32_t din_bits, uint32_t dummy_bits); |
| 64 | void spi_tx8fast(uint8_t spi_no, uint8_t dout_data); |
| 65 | |
| 66 | // Expansion Macros |
| 67 | #define spi_busy(spi_no) READ_PERI_REG(SPI_CMD(spi_no))&SPI_USR |
| 68 | |
| 69 | #define spi_txd(spi_no, bits, data) spi_transaction(spi_no, 0, 0, 0, 0, bits, (uint32_t) data, 0, 0) |
| 70 | #define spi_tx8(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 8, (uint32_t) data, 0, 0) |
| 71 | #define spi_tx16(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 16, (uint32_t) data, 0, 0) |
| 72 | #define spi_tx32(spi_no, data) spi_transaction(spi_no, 0, 0, 0, 0, 32, (uint32_t) data, 0, 0) |
| 73 | |
| 74 | #define spi_rxd(spi_no, bits) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, bits, 0) |
| 75 | #define spi_rx8(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 8, 0) |
| 76 | #define spi_rx16(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 16, 0) |
| 77 | #define spi_rx32(spi_no) spi_transaction(spi_no, 0, 0, 0, 0, 0, 0, 32, 0) |
| 78 | |
| 79 | #endif |