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Hardware CTS and RTS #146

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0d32cfa
hardware CTS and RTS support
S0urceror Dec 12, 2023
125ea39
Merge commit '30b2f9be511e3f99d65a94700f6984bf5f64f7fa' into hw_cts_rts
S0urceror Dec 12, 2023
3166225
Hardware CTS and RTS merged with main
S0urceror Jan 8, 2024
2f0c00d
start with half-duplex and switch to full-duplex with PACKET_GP > 1
S0urceror Jan 9, 2024
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11 changes: 10 additions & 1 deletion video/vdp_protocol.h
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Original file line number Diff line number Diff line change
Expand Up @@ -16,12 +16,21 @@

#define VDPSerial Serial2

void vdp_serial_half_duplex ()
{
VDPSerial.setHwFlowCtrlMode(HW_FLOWCTRL_RTS); // default to half-duplex
}
void vdp_serial_full_duplex ()
{
VDPSerial.setHwFlowCtrlMode(HW_FLOWCTRL_CTS_RTS); // set to full-duplex when EZ80 OS indicates this
}

void setupVDPProtocol() {
VDPSerial.end();
VDPSerial.setRxBufferSize(UART_RX_SIZE); // Can't be called when running
VDPSerial.begin(UART_BR, SERIAL_8N1, UART_RX, UART_TX);
VDPSerial.setHwFlowCtrlMode(HW_FLOWCTRL_RTS, 64); // Can be called whenever
VDPSerial.setPins(UART_NA, UART_NA, UART_CTS, UART_RTS); // Must be called after begin
vdp_serial_half_duplex ();
}

// TODO remove the following - it's only here for cursor.h to send escape key when doing paged mode handling
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5 changes: 5 additions & 0 deletions video/vdu_sys.h
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Original file line number Diff line number Diff line change
Expand Up @@ -189,6 +189,11 @@ void VDUStreamProcessor::sendGeneralPoll() {
uint8_t packet[] = {
(uint8_t) (b & 0xFF),
};
// for EZ80 OS-es with ID>1 assume full_duplex
// this includes MOS hw-cts-rts branch and ElectronOS
// for fast error-free reads and writes to EZ80
if (b>1)
vdp_serial_full_duplex ();
send_packet(PACKET_GP, sizeof packet, packet);
initialised = true;
}
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4 changes: 2 additions & 2 deletions video/video.ino
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Original file line number Diff line number Diff line change
Expand Up @@ -54,12 +54,12 @@
#define RC 0

#define DEBUG 0 // Serial Debug Mode: 1 = enable
#define SERIALBAUDRATE 115200
#define SERIALBAUDRATE 500000

HardwareSerial DBGSerial(0);

bool terminalMode = false; // Terminal mode (for CP/M)
bool consoleMode = false; // Serial console mode (0 = off, 1 = console enabled)
bool consoleMode = true; // Serial console mode (0 = off, 1 = console enabled)

#include "agon.h" // Configuration file
#include "agon_ps2.h" // Keyboard support
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