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Add sfr16 SFR_REG_ADDR_U16.

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So instead do it manual split a uint16_t in to two uint8_t.
The compiler can do it, so reduces user error.
Note: compiler writes the lower/LSB part first.
      When that is importent this can´t be used.

Assembly is still the same except note above.
This commit is contained in:
René van Dorst
2025-09-01 09:20:36 +02:00
committed by René van Dorst
parent 250beae09b
commit af0135bcce
2 changed files with 12 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files
rtl837x_sfr.h
+4
View File
@@ -1,8 +1,12 @@
/* SFR control registers for switch register access */
__sfr __at(0xa0) SFR_EXEC_GO;
__sfr __at(0xa1) SFR_EXEC_STATUS;
__sfr16 __at(0xa2a3) SFR_REG_ADDR_U16;
__sfr __at(0xa2) SFR_REG_ADDRH;
__sfr __at(0xa3) SFR_REG_ADDRL;
__sfr16 __at(0xa4a5) SFR_DATA_U16;
__sfr32 __at(0xa4a5a6a7) SFR_DATA_U32;
__sfr32 __at(0xa7a6a5a4) SFR_DATA_U32LE;
__sfr __at(0xa4) SFR_DATA_24;
__sfr __at(0xa5) SFR_DATA_16;
__sfr __at(0xa6) SFR_DATA_8;
rtlplayground.c
+8 -8
View File
@@ -284,8 +284,8 @@ void setup_timer0(void)
void reg_read(uint16_t reg_addr)
{
SFR_REG_ADDRH = reg_addr >> 8;
SFR_REG_ADDRL = reg_addr;
SFR_REG_ADDR_U16 = reg_addr;
SFR_EXEC_GO = SFR_EXEC_READ_REG;
do {
} while (SFR_EXEC_STATUS != 0);
@@ -298,8 +298,8 @@ void reg_read_m(uint16_t reg_addr)
#ifdef REGDBG
if (EA) { write_char('r'); print_byte(reg_addr >> 8); print_byte(reg_addr); write_char(':'); }
#endif
SFR_REG_ADDRH = reg_addr >> 8;
SFR_REG_ADDRL = reg_addr;
SFR_REG_ADDR_U16 = reg_addr;
SFR_EXEC_GO = SFR_EXEC_READ_REG;
do {
} while (SFR_EXEC_STATUS != 0);
@@ -316,8 +316,8 @@ void reg_read_m(uint16_t reg_addr)
void reg_write(uint16_t reg_addr)
{
/* Data to write must be in SFR A4, A5, A6, A7 */
SFR_REG_ADDRH = reg_addr >> 8;
SFR_REG_ADDRL = reg_addr;
SFR_REG_ADDR_U16 = reg_addr;
SFR_EXEC_GO = SFR_EXEC_WRITE_REG;
do {
} while (SFR_EXEC_STATUS != 0);
@@ -332,8 +332,8 @@ void reg_write_m(uint16_t reg_addr)
print_byte(sfr_data[0]); print_byte(sfr_data[1]); print_byte(sfr_data[2]); print_byte(sfr_data[3]); write_char(' ');
}
#endif
SFR_REG_ADDRH = reg_addr >> 8;
SFR_REG_ADDRL = reg_addr;
SFR_REG_ADDR_U16 = reg_addr;
SFR_DATA_24 = sfr_data[0] ;
SFR_DATA_16 = sfr_data[1];
SFR_DATA_8 = sfr_data[2];