1.将A27新UI文件夹重命名为CANUI 2.A272O新版本发布

MXC_A27-PCB4.5-CANUI/ArkmicroFiles/libboard-amt630hv100/source/i2c-slave-eeprom.c

@@ -0,0 +1,102 @@
+#include "FreeRTOS.h"
+#include "board.h"
+#include "chip.h"
+
+#ifdef I2C_EEPROM_SLAVE_DEMO
+#if !defined(I2C0_SLAVE_MODE) && !defined(I2C1_SLAVE_MODE)
+#error "i2c eeprom slave demo needs a slave mode i2c dev"
+#endif
+
+#define I2C_EEPROM_24C02_ADDR	0x50
+#define I2C_EEPROM_24C02_SIZE	256
+
+struct eeprom_data {
+	bool first_write;
+	u8 buffer_idx;
+	u8 buffer[];
+};
+
+static struct eeprom_data *g_eeprom = NULL;
+static struct i2c_adapter *g_adap = NULL;
+
+static int i2c_slave_eeprom_slave_cb(struct i2c_adapter *adap,
+				     enum i2c_slave_event event, u8 *val)
+{
+	struct eeprom_data *eeprom = g_eeprom;
+
+	switch (event) {
+	case I2C_SLAVE_WRITE_RECEIVED:
+		if (eeprom->first_write) {
+			eeprom->buffer_idx = *val;
+			eeprom->first_write = false;
+		} else {
+			eeprom->buffer[eeprom->buffer_idx++] = *val;
+		}
+		break;
+
+	case I2C_SLAVE_READ_REQUESTED:
+		*val = eeprom->buffer[eeprom->buffer_idx++];
+		/*
+		 * Do not increment buffer_idx here, because we don't know if
+		 * this byte will be actually used. Read Linux I2C slave docs
+		 * for details.
+		 */
+		break;
+
+	case I2C_SLAVE_STOP:
+	case I2C_SLAVE_WRITE_REQUESTED:
+		eeprom->first_write = true;
+		break;
+
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+int i2c_slave_eeprom_init(void)
+{
+	struct eeprom_data *eeprom;
+	int ret;
+	unsigned size = I2C_EEPROM_24C02_SIZE;
+	struct i2c_adapter *adap = NULL;
+
+	eeprom = pvPortMalloc(sizeof(struct eeprom_data) + size);
+	if (!eeprom)
+		return -ENOMEM;
+	g_eeprom = eeprom;
+
+	eeprom->first_write = true;
+#ifdef I2C0_SLAVE_MODE
+	adap = i2c_open("i2c0");
+#else
+	adap = i2c_open("i2c1");
+#endif
+	if (!adap) {
+		printf("%s open i2c fail.\n", __func__);
+		vPortFree(eeprom);
+		return -1;
+	}
+	g_adap = adap;
+
+	ret = i2c_slave_register(adap, I2C_EEPROM_24C02_ADDR, i2c_slave_eeprom_slave_cb);
+	if (ret) {
+		return ret;
+	}
+
+	return 0;
+};
+
+int i2c_slave_eeprom_uninit(void)
+{
+	if (g_adap)
+		i2c_slave_unregister(g_adap);
+
+	if (g_eeprom)
+		vPortFree(g_eeprom);
+
+	return 0;
+}
+
+#endif