Renesas RL78/G13 - Flowchart of CSI Transmission;Reception

RL78/G13 Handshake-based SPI Master Transmission/Reception
R01AN6883EJ0100 Rev.1.00 Page 33 of 38
June.15.23
5.6.15 Flowchart of CSI Transmission/Reception
Figure 5-16 shows the flow of transmission and reception.
Figure 5-16 CSI Transmission/Reception
CSI00_Send_Receive
()
Extract slave transmittable data
count and set it in g_num
return
g_num >= TX_RX_NUM
g_rx_data_stored[1] >=
TX_RX_NUM
Is slave receivable data greater
than transmit/receive data?
Enable interrupts
cnt = 0
cnt <= TX_RX_NUM+1
Is a return value from wait() 0?
cnt == 0
Set transmit/receive command
in buffer for transmit data
Set TX_DATA[] in buffer for transmit data
R_CSI00_Send_Receive(&g_tx_data,
data_length, &g_rx_data)
Enter HALT mode
INTCSI00 occurred
cnt != 0
Store receive data
cnt ++
Set g_timeout_flag
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No