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- /****************************************************************************
- * drivers/lcd/ft80x_spi.c
- *
- * Licensed to the Apache Software Foundation (ASF) under one or more
- * contributor license agreements. See the NOTICE file distributed with
- * this work for additional information regarding copyright ownership. The
- * ASF licenses this file to you under the Apache License, Version 2.0 (the
- * "License"); you may not use this file except in compliance with the
- * License. You may obtain a copy of the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations
- * under the License.
- *
- ****************************************************************************/
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <inttypes.h>
- #include <unistd.h>
- #include <assert.h>
- #include <errno.h>
- #include <debug.h>
- #include <nuttx/kmalloc.h>
- #include <nuttx/lcd/ft80x.h>
- #include <nuttx/spi/spi.h>
- #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: %" PRId32 "\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 */
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