--- /dev/null
+SD/MMC card support example
+
+Copyright 2017 Nathael Pajani <nathael.pajani@ed3l.fr>
+
+
+/* ****************************************************************************
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *************************************************************************** */
+
+
+This example reads data from the first 16 bytes of the first four bolcs of
+the SD card to collect a message to be displayed, and then stores temperature
+data on the SD, with one sample on each successive block, starting on the
+fifth block.
+
+This demonstrates basic usage of the SD, but is very inefective for recent
+SD cards (SDHC and SDXC) as they have fixed 512 bytes blocks : this will
+leave the remaining part of the 512 bytes "empty".
+A better usage should store up to 512 bytes of data before writting to the
+SD card.
+
+In order to write the "hello" messages to the SD card, use something like
+this (adapt to the SD device name) :
+SDDEV="/dev/sdc"
+echo "This message is not much usefull, and gonna get split." > /tmp/msg
+for i in $(seq 0 3) ; do
+ dd if=/tmp/msg of=$SDDEV ibs=16 obs=512 count=1 skip=$i seek=$i
+done
+
+In order to display data from the SD, you can use hexdump :
+SDDEV="/dev/sdc"
+hexdump -n 6000 -C $SDDEV
+
+
--- /dev/null
+/****************************************************************************
+ * apps/base/usd_card/main.c
+ *
+ * SD/MMC card example
+ *
+ * Copyright 2017 Nathael Pajani <nathael.pajani@ed3l.fr>
+ *
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ *************************************************************************** */
+
+
+/*
+ * This example reads data from the first 16 bytes of the first four bolcs of
+ * the SD card to collect a message to be displayed, and then stores temperature
+ * data on the SD, with one sample on each successive block, starting on the
+ * fifth block.
+ *
+ * See README for more info.
+ */
+
+
+#include "core/system.h"
+#include "core/systick.h"
+#include "core/pio.h"
+#include "lib/stdio.h"
+#include "lib/errno.h"
+#include "lib/utils.h"
+#include "drivers/serial.h"
+#include "drivers/gpio.h"
+#include "drivers/ssp.h"
+#include "drivers/i2c.h"
+
+#include "extdrv/status_led.h"
+#include "extdrv/tmp101_temp_sensor.h"
+#include "extdrv/sdmmc.h"
+
+#define MODULE_VERSION 0x04
+#define MODULE_NAME "GPIO Demo Module"
+
+
+#define SELECTED_FREQ FREQ_SEL_48MHz
+
+
+/***************************************************************************** */
+/* Pins configuration */
+/* pins blocks are passed to set_pins() for pins configuration.
+ * Unused pin blocks can be removed safely with the corresponding set_pins() call
+ * All pins blocks may be safelly merged in a single block for single set_pins() call..
+ */
+const struct pio_config common_pins[] = {
+ /* UART 0 : Config / Debug / USB */
+ { LPC_UART0_RX_PIO_0_1, LPC_IO_DIGITAL },
+ { LPC_UART0_TX_PIO_0_2, LPC_IO_DIGITAL },
+ /* I2C : TMP101 */
+ { LPC_I2C0_SCL_PIO_0_10, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) },
+ { LPC_I2C0_SDA_PIO_0_11, (LPC_IO_DIGITAL | LPC_IO_OPEN_DRAIN_ENABLE) },
+ /* SPI : uSD card */
+ { LPC_SSP0_SCLK_PIO_0_14, LPC_IO_DIGITAL },
+ { LPC_SSP0_MOSI_PIO_0_17, LPC_IO_DIGITAL },
+ { LPC_SSP0_MISO_PIO_0_16, LPC_IO_DIGITAL },
+ /* GPIO */
+ { LPC_GPIO_1_6, LPC_IO_DIGITAL }, /* uSD Card SPI Chip Select */
+ ARRAY_LAST_PIO,
+};
+
+const struct pio status_led_green = LPC_GPIO_1_4;
+const struct pio status_led_red = LPC_GPIO_1_5;
+
+
+/***************************************************************************** */
+/* TMP101 onboard I2C temperature sensor */
+#define TMP101_ADDR 0x94 /* Pin Addr0 (pin5 of tmp101) connected to VCC */
+struct tmp101_sensor_config tmp101_sensor = {
+ .bus_num = I2C0,
+ .addr = TMP101_ADDR,
+ .resolution = TMP_RES_ELEVEN_BITS,
+};
+
+void temp_config(int uart_num)
+{
+ int ret = 0;
+ ret = tmp101_sensor_config(&tmp101_sensor);
+ if (ret != 0) {
+ uprintf(uart_num, "Temp config error: %d\n", ret);
+ }
+}
+
+
+
+/***************************************************************************** */
+/* SD/MMC Card */
+struct sdmmc_card micro_sd = {
+ .ssp_bus_num = SSP_BUS_0,
+ .card_type = MMC_CARDTYPE_UNKNOWN,
+ .block_size = 16,
+ .chip_select = LPC_GPIO_0_15,
+};
+#define MMC_BUF_SIZE 64
+uint8_t mmc_data[MMC_BUF_SIZE];
+
+
+/***************************************************************************** */
+void system_init()
+{
+ /* Configure the Watchdog */
+ startup_watchdog_disable(); /* Do it right now, before it gets a chance to break in */
+ system_brown_out_detection_config(0); /* No ADC used */
+ system_set_default_power_state();
+ clock_config(SELECTED_FREQ);
+ set_pins(common_pins);
+ gpio_on();
+ status_led_config(&status_led_green, &status_led_red);
+ /* System tick timer MUST be configured and running in order to use the sleeping
+ * functions */
+ systick_timer_on(1); /* 1ms */
+ systick_start();
+}
+
+/* Define our fault handler. This one is not mandatory, the dummy fault handler
+ * will be used when it's not overridden here.
+ * Note : The default one does a simple infinite loop. If the watchdog is deactivated
+ * the system will hang.
+ */
+void fault_info(const char* name, uint32_t len)
+{
+ uprintf(UART0, name);
+ while (1);
+}
+
+
+
+/***************************************************************************** */
+int main(void)
+{
+ int ret = 0;
+ system_init();
+ uart_on(UART0, 115200, NULL);
+ i2c_on(I2C0, I2C_CLK_100KHz, I2C_MASTER);
+ ssp_master_on(0, LPC_SSP_FRAME_SPI, 8, 4*1000*1000);
+
+ /* TMP101 sensor config */
+ temp_config(UART0);
+
+ /* microSD card init */
+ do {
+ ret = sdmmc_init(µ_sd);
+ if (ret == 0) {
+ msleep(10);
+ ret = sdmmc_init_wait_card_ready(µ_sd);
+ if (ret == 0) {
+ ret = sdmmc_init_end(µ_sd);
+ }
+ }
+ uprintf(UART0, "uSD init: %d, type: %d, bs: %d\n", ret, micro_sd.card_type, micro_sd.block_size);
+ } while (ret != 0);
+ memset(mmc_data, 0, MMC_BUF_SIZE);
+ ret = sdmmc_read_block(µ_sd, 0, mmc_data);
+ ret = sdmmc_read_block(µ_sd, 1, (mmc_data + 16));
+ ret = sdmmc_read_block(µ_sd, 2, (mmc_data + 32));
+ ret = sdmmc_read_block(µ_sd, 3, (mmc_data + 48));
+ uprintf(UART0, "uSD read: %s\n", mmc_data);
+
+ msleep(50);
+
+ while (1) {
+ int tmp101_deci_degrees = 0;
+ int abs_deci = 0;
+ static int block_num = 4;
+
+ /* Do not write too many times, one data every 20s is more than enough for a test */
+ msleep(20 * 1000);
+
+ /* Get internal temperature */
+ tmp101_sensor_start_conversion(&tmp101_sensor);
+ msleep(40);
+ ret = tmp101_sensor_read(&tmp101_sensor, NULL, &tmp101_deci_degrees);
+ if (ret != 0) {
+ uprintf(UART0, "TMP101 read error : %d\n", ret);
+ }
+ if (tmp101_deci_degrees < 0) {
+ abs_deci = -tmp101_deci_degrees;
+ } else {
+ abs_deci = tmp101_deci_degrees;
+ }
+
+ /* Write time and temp to uSD */
+ memset(mmc_data, 0, MMC_BUF_SIZE);
+ mmc_data[0] = tmp101_deci_degrees / 10;
+ mmc_data[1] = abs_deci % 10;
+ ret = sdmmc_write_block(µ_sd, block_num++, mmc_data);
+ uprintf(UART0, "Wrote data on block %d: ret=%d\n", (block_num - 1), ret);
+
+ /* Display */
+ uprintf(UART0, "Internal Temp : % 4d.%02d\n", (tmp101_deci_degrees / 10), (abs_deci % 10));
+ }
+ return 0;
+}
+
+
