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h8_sci: Fix sync transmissions

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This commit is contained in:
Olivier Galibert 2024-02-29 13:31:26 +01:00
parent 661208a015
commit f1bb8a02ff
1 changed files with 14 additions and 5 deletions
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19
src/devices/cpu/h8/h8_sci.cpp
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@ -589,7 +589,7 @@ void h8_sci_device::tx_async_step()
void h8_sci_device::tx_sync_tick() void h8_sci_device::tx_sync_tick()
{ {
m_tx_clock_counter = (m_tx_clock_counter + 1) & 1; m_tx_clock_counter = (m_tx_clock_counter + 1) & 1;
LOGMASKED(LOG_TICK, "%s tx_sync_tick %x\n", machine().time().to_string(), m_tx_clock_counter); LOGMASKED(LOG_TICK, "tx_sync_tick %x\n", m_tx_clock_counter);
if(m_tx_clock_counter == 0) { if(m_tx_clock_counter == 0) {
tx_sync_step(); tx_sync_step();
@ -603,9 +603,6 @@ void h8_sci_device::tx_sync_tick()
void h8_sci_device::tx_sync_step() void h8_sci_device::tx_sync_step()
{ {
LOGMASKED(LOG_STATE, "tx_sync_step bit=%d\n", m_tx_bit); LOGMASKED(LOG_STATE, "tx_sync_step bit=%d\n", m_tx_bit);
m_cpu->do_sci_tx(m_id, m_tsr & 1);
m_tsr >>= 1;
m_tx_bit--;
if(!m_tx_bit) { if(!m_tx_bit) {
m_tx_state = ST_IDLE; m_tx_state = ST_IDLE;
m_tx_bit = 0; m_tx_bit = 0;
@ -618,6 +615,10 @@ void h8_sci_device::tx_sync_step()
// if there's more to send, start the transmitter // if there's more to send, start the transmitter
if((m_scr & SCR_TE) && !(m_ssr & SSR_TDRE)) if((m_scr & SCR_TE) && !(m_ssr & SSR_TDRE))
tx_start(); tx_start();
} else {
m_cpu->do_sci_tx(m_id, m_tsr & 1);
m_tsr >>= 1;
m_tx_bit--;
} }
} }
@ -735,9 +736,17 @@ void h8_sci_device::rx_sync_tick()
{ {
m_rx_clock_counter = (m_rx_clock_counter + 1) & 1; m_rx_clock_counter = (m_rx_clock_counter + 1) & 1;
LOGMASKED(LOG_TICK, "rx_sync_tick %x\n", m_rx_clock_counter); LOGMASKED(LOG_TICK, "rx_sync_tick %x\n", m_rx_clock_counter);
if(m_rx_clock_counter == 1)
if(m_rx_clock_counter == 0 && m_clock_mode == INTERNAL_SYNC_OUT)
m_cpu->do_sci_clk(m_id, 0);
else if(m_rx_clock_counter == 1) {
if(m_clock_mode == INTERNAL_SYNC_OUT)
m_cpu->do_sci_clk(m_id, 1);
rx_sync_step(); rx_sync_step();
} }
}
void h8_sci_device::rx_sync_step() void h8_sci_device::rx_sync_step()
{ {