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[sw/bootloader] add two byte twi addressing

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This commit is contained in:
Lukas Pajak 2025-01-02 16:27:08 +01:00
parent e20f25127a
commit 6955eb5734
2 changed files with 23 additions and 3 deletions
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25
sw/bootloader/bootloader.c
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@ -122,11 +122,16 @@
#define TWI_CLK_DIV 3
#endif
/** TWI First Slave ID*/
/** TWI First Slave ID */
#ifndef TWI_SLAVE_ID
#define TWI_SLAVE_ID 0x50
#endif
/** TWI Memory address width (in numbers of bytes; 1 or 2) */
#ifndef TWI_ADDR_BYTES
#define TWI_ADDR_BYTES 1
#endif
/**@}*/
@ -1040,8 +1045,13 @@ uint32_t twi_read_addr(uint32_t addr) {
address.uint32 = addr;
uint8_t device_id = address.uint8[1] + TWI_SLAVE_ID;
#if (TWI_ADDR_BYTES == 1)
uint8_t device_id = address.uint8[TWI_ADDR_BYTES] + TWI_SLAVE_ID;
#elif (TWI_ADDR_BYTES == 2)
uint8_t device_id = TWI_SLAVE_ID;
#else
#error "Unsupported TWI_ADDR_BYTES configuration!"
#endif
/***********************
@ -1055,8 +1065,17 @@ uint32_t twi_read_addr(uint32_t addr) {
device_nack |= neorv32_twi_trans(&transfer, 0);
// Send read address
#if (TWI_ADDR_BYTES == 1)
transfer = address.uint8[0];
device_nack |= neorv32_twi_trans(&transfer, 0);
#elif (TWI_ADDR_BYTES == 2)
transfer = address.uint8[1];
device_nack |= neorv32_twi_trans(&transfer, 0);
transfer = address.uint8[0];
device_nack |= neorv32_twi_trans(&transfer, 0);
#else
#error "Unsupported TWI_ADDR_BYTES configuration!"
#endif
/***********************
* Read data

1
sw/bootloader/makefile
View file

@ -43,6 +43,7 @@ USER_FLAGS += \
#USER_FLAGS += -DTWI_CLK_PRSC=CLK_PRSC_64
#USER_FLAGS += -DTWI_CLK_DIV=3
#USER_FLAGS += -DTWI_SLAVE_ID=0x50
#USER_FLAGS += -DTWI_ADDR_BYTES=0x50
# Set path to NEORV32 root directory
NEORV32_HOME ?= ../..