7.7.4 PRIME: Send Message (Buffer 0)
In a message transmission, there is only one SPI transaction that includes both parameters and data.
In the figure above, the following can be seen:
- Master (MOSI):
- Send ID memory region(16 bits): 0x0001 (ATPL360_TX0_PARAM_ID)
- Send SPI command (1 bit): 1 (write command)
- Send SPI params length (15 bits) (in blocks of 16-bits): (param length + data length) / 2, where param length is 12 bytes
- Send configuration parameters of PRIME transmission (12 bytes)
- Send data part of message (variable)
- Slave (MISO): PL360 responds with Firmware Header (0x1122)
IRQ is not used in this request operation.