/**************************************************************************** * drivers/lcd/ft80x_spi.c * * Copyright (C) 2018 Gregory Nutt. All rights reserved. * Author: Gregory Nutt * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * 3. Neither the name NuttX nor the names of its contributors may be * used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGE. * ****************************************************************************/ /**************************************************************************** * Included Files ****************************************************************************/ #include #include #include #include #include #include #include #include "ft80x.h" #if defined(CONFIG_LCD_FT80X) && defined(CONFIG_LCD_FT80X_SPI) /**************************************************************************** * Private Functions ****************************************************************************/ /**************************************************************************** * Name: ft80x_select * * Description: * Select the FT80X part * ****************************************************************************/ static void ft80x_select(FAR struct ft80x_dev_s *priv) { lcdinfo("Mode: %d Bits: 8 Frequency: %d\n", SPIDEV_MODE0, priv->frequency); DEBUGASSERT(priv != NULL); /* Lock the SPI bus */ SPI_LOCK(priv->spi, true); /* Configure SPI for the FT80X */ SPI_SETMODE(priv->spi, SPIDEV_MODE0); SPI_SETBITS(priv->spi, 8); SPI_HWFEATURES(priv->spi, 0); SPI_SETFREQUENCY(priv->spi, priv->frequency); /* Select SPI device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), true); } /**************************************************************************** * Name: ft80x_deselect * * Description: * De-select the FT80X part * ****************************************************************************/ static void ft80x_deselect(FAR struct ft80x_dev_s *priv) { /* Des-select the FT80x device */ SPI_SELECT(priv->spi, SPIDEV_DISPLAY(0), false); /* Unlock bus */ SPI_LOCK(priv->spi, false); } /**************************************************************************** * Public Functions ****************************************************************************/ /**************************************************************************** * Name: ft80x_host_command * * Description: * Send a host command to the FT80x * * For an SPI write command write transaction, the host writes a zero bit * followed by a one bit, followed by the 5-bit command, followed by two * bytes of zero. All data is streamed with a single chip select. * * NOTE: Commands are defined in ft80x.h with bit 7 = 0 and bit 6 = 1. * ****************************************************************************/ void ft80x_host_command(FAR struct ft80x_dev_s *priv, uint8_t cmd) { struct ft80x_hostwrite_s hostwrite; DEBUGASSERT(priv != NULL && (cmd == 0x00 || (cmd & 0xc0) == 0x40)); /* Format the host write command */ hostwrite.cmd = cmd; hostwrite.pad1 = 0; hostwrite.pad2 = 0; /* Select the FT80x */ ft80x_select(priv); /* Send the host write command */ SPI_SNDBLOCK(priv->spi, &hostwrite, sizeof(struct ft80x_hostwrite_s)); /* De-select the FT80x */ ft80x_deselect(priv); } /**************************************************************************** * Name: ft80x_read_memory * * Description: * Read from FT80X memory * * For SPI memory read transaction, the host sends two zero bits, followed * by the 22-bit address. This is followed by a dummy byte. After the dummy * byte, the FT80x responds to each host byte with read data bytes. * ****************************************************************************/ void ft80x_read_memory(FAR struct ft80x_dev_s *priv, uint32_t addr, FAR void *buffer, size_t buflen) { struct ft80x_spiread_s spiread; DEBUGASSERT(priv != NULL && (addr & 0xffc00000) == 0 && buffer != NULL && buflen > 0); /* Format the read header */ spiread.addrh = (addr >> 16) & 0x3f; spiread.addrm = (addr >> 8) & 0xff; spiread.addrl = addr & 0xff; spiread.dummy = 0xff; /* Select the FT80x */ ft80x_select(priv); /* Send the read header */ SPI_SNDBLOCK(priv->spi, &spiread, sizeof(struct ft80x_spiread_s)); /* Then read the FT80x memory into the user provided buffer */ SPI_RECVBLOCK(priv->spi, buffer, buflen); /* De-select the FT80x */ ft80x_deselect(priv); } /**************************************************************************** * Name: ft80x_read_byte, ft80x_read_hword, ft80x_read_word * * Description: * Read an 8-, 16-, or 32-bt bit value from FT80X memory * * For SPI memory read transaction, the host sends two zero bits, followed * by the 22-bit address. This is followed by a dummy byte. After the dummy * byte, the FT80x responds to each host byte with read data bytes. * ****************************************************************************/ uint8_t ft80x_read_byte(FAR struct ft80x_dev_s *priv, uint32_t addr) { uint8_t data; ft80x_read_memory(priv, addr, (FAR void *)&data, 1); return data; } uint16_t ft80x_read_hword(FAR struct ft80x_dev_s *priv, uint32_t addr) { uint16_t data; ft80x_read_memory(priv, addr, (FAR void *)&data, 2); return data; } uint32_t ft80x_read_word(FAR struct ft80x_dev_s *priv, uint32_t addr) { uint32_t data; ft80x_read_memory(priv, addr, (FAR void *)&data, 4); return data; } /**************************************************************************** * Name: ft80x_write_memory * * Description: * Write to FT80X memory * * For SPI memory write transaction, the host sends a '1' bit and '0' bit, * followed by the 22-bit address. This is followed by the write data. * ****************************************************************************/ void ft80x_write_memory(FAR struct ft80x_dev_s *priv, uint32_t addr, FAR const void *buffer, size_t buflen) { struct ft80x_spiwrite_s spiwrite; DEBUGASSERT(priv != NULL && (addr & 0xffc00000) == 0 && buffer != NULL && buflen > 0); /* Format the write header */ spiwrite.addrh = 0x80 | ((addr >> 16) & 0x3f); spiwrite.addrm = (addr >> 8) & 0xff; spiwrite.addrl = addr & 0xff; /* Select the FT80x */ ft80x_select(priv); /* Send the write header */ SPI_SNDBLOCK(priv->spi, &spiwrite, sizeof(struct ft80x_spiwrite_s)); /* Then write to the FT80x memory from the user provided buffer */ SPI_SNDBLOCK(priv->spi, buffer, buflen); /* De-select the FT80x */ ft80x_deselect(priv); } /**************************************************************************** * Name: ft80x_write_byte, ft80x_write_hword, ft80x_write_word * * Description: * Write an 8-, 16-, or 32-bt bit value to FT80X memory * * For SPI memory write transaction, the host sends a '1' bit and '0' bit, * followed by the 22-bit address. This is followed by the write data. * ****************************************************************************/ void ft80x_write_byte(FAR struct ft80x_dev_s *priv, uint32_t addr, uint8_t data) { struct ft80x_spiwrite8_s spiwrite; DEBUGASSERT(priv != NULL && (addr & 0xffc00000) == 0); /* Format the write header */ spiwrite.addrh = 0x80 | ((addr >> 16) & 0x3f); spiwrite.addrm = (addr >> 8) & 0xff; spiwrite.addrl = addr & 0xff; spiwrite.data = data; /* Select the FT80x */ ft80x_select(priv); /* Send the write header and 8-bit data */ SPI_SNDBLOCK(priv->spi, &spiwrite, sizeof(struct ft80x_spiwrite8_s)); /* De-select the FT80x */ ft80x_deselect(priv); } void ft80x_write_hword(FAR struct ft80x_dev_s *priv, uint32_t addr, uint16_t data) { struct ft80x_spiwrite16_s spiwrite; DEBUGASSERT(priv != NULL && (addr & 0xffc00000) == 0); /* Format the write header */ spiwrite.addrh = 0x80 | ((addr >> 16) & 0x3f); spiwrite.addrm = (addr >> 8) & 0xff; spiwrite.addrl = addr & 0xff; spiwrite.data[0] = data & 0xff; /* Little endian */ spiwrite.data[1] = (data >> 8) & 0xff; /* Select the FT80x */ ft80x_select(priv); /* Send the write header and 16-bit data */ SPI_SNDBLOCK(priv->spi, &spiwrite, sizeof(struct ft80x_spiwrite16_s)); /* De-select the FT80x */ ft80x_deselect(priv); } void ft80x_write_word(FAR struct ft80x_dev_s *priv, uint32_t addr, uint32_t data) { struct ft80x_spiwrite32_s spiwrite; DEBUGASSERT(priv != NULL && (addr & 0xffc00000) == 0); /* Format the write header */ spiwrite.addrh = 0x80 | ((addr >> 16) & 0x3f); spiwrite.addrm = (addr >> 8) & 0xff; spiwrite.addrl = addr & 0xff; spiwrite.data[0] = data & 0xff; /* Little endian */ spiwrite.data[1] = (data >> 8) & 0xff; spiwrite.data[2] = (data >> 16) & 0xff; spiwrite.data[3] = (data >> 24) & 0xff; /* Select the FT80x */ ft80x_select(priv); /* Send the write header and 32-bit data */ SPI_SNDBLOCK(priv->spi, &spiwrite, sizeof(struct ft80x_spiwrite32_s)); /* De-select the FT80x */ ft80x_deselect(priv); } #endif /* CONFIG_LCD_FT80X && CONFIG_LCD_FT80X_SPI */