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[Nuvoton] Avoid re-configuring UART in serial_init() for the same H/W UART 

The same H/W UART may be shared by multiple serial_t objects. This fix tries to avoid
re-configuring the same H/W UART in serial_init() when there are multiple serial_t
objects constructed. To re-configure UART, call serial_baud() and serial_format()
explicitly. This can avoid confusion when e.g. a newly constructed serial_t object
changes baudrate unexpectedly in serial_init().
pull/8900/head
ccli8 2018-11-28 16:26:21 +08:00
parent 6b16112962
commit ae98b94a10
5 changed files with 58 additions and 62 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
targets/TARGET_NUVOTON/TARGET_M2351/serial_api.c
View File

@ -200,7 +200,6 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
struct nu_uart_var *var = (struct nu_uart_var *) modinit->var;
if (! var->ref_cnt) {
do {
/* Reset module
*
* NOTE: We must call secure version (from non-secure domain) because SYS/CLK regions are secure.
@ -221,14 +220,13 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
} while (0);
}
var->ref_cnt ++;
// Configure the UART module and set its baudrate
serial_baud(obj, 9600);
// Configure data bits, parity, and stop bits
serial_format(obj, 8, ParityNone, 1);
}
var->ref_cnt ++;
obj->serial.vec = var->vec;
obj->serial.irq_en = 0;

4
targets/TARGET_NUVOTON/TARGET_M451/serial_api.c
View File

@ -180,13 +180,13 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
}
var->ref_cnt ++;
// Configure the UART module and set its baudrate
serial_baud(obj, 9600);
// Configure data bits, parity, and stop bits
serial_format(obj, 8, ParityNone, 1);
}
var->ref_cnt ++;
obj->serial.vec = var->vec;
obj->serial.irq_en = 0;

6
targets/TARGET_NUVOTON/TARGET_M480/serial_api.c
View File

@ -200,7 +200,6 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
struct nu_uart_var *var = (struct nu_uart_var *) modinit->var;
if (! var->ref_cnt) {
do {
// Reset this module
SYS_ResetModule(modinit->rsetidx);
@ -211,14 +210,13 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
} while (0);
}
var->ref_cnt ++;
// Configure the UART module and set its baudrate
serial_baud(obj, 9600);
// Configure data bits, parity, and stop bits
serial_format(obj, 8, ParityNone, 1);
}
var->ref_cnt ++;
obj->serial.vec = var->vec;
obj->serial.irq_en = 0;

4
targets/TARGET_NUVOTON/TARGET_NANO100/serial_api.c
View File

@ -145,13 +145,13 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
}
var->ref_cnt ++;
// Configure the UART module and set its baudrate
serial_baud(obj, 9600);
// Configure data bits, parity, and stop bits
serial_format(obj, 8, ParityNone, 1);
}
var->ref_cnt ++;
obj->serial.vec = var->vec;
obj->serial.irq_en = 0;

4
targets/TARGET_NUVOTON/TARGET_NUC472/serial_api.c
View File

@ -210,13 +210,13 @@ void serial_init(serial_t *obj, PinName tx, PinName rx)
pinmap_pinout(tx, PinMap_UART_TX);
pinmap_pinout(rx, PinMap_UART_RX);
}
var->ref_cnt ++;
// Configure the UART module and set its baudrate
serial_baud(obj, 9600);
// Configure data bits, parity, and stop bits
serial_format(obj, 8, ParityNone, 1);
}
var->ref_cnt ++;
obj->serial.vec = var->vec;
obj->serial.irq_en = 0;