diff options
Diffstat (limited to 'firmware/target/arm')
-rw-r--r-- | firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c | 2 | ||||
-rw-r--r-- | firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c | 6 |
2 files changed, 4 insertions, 4 deletions
diff --git a/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c index fd5d9577a3..770f4eb4e6 100644 --- a/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c +++ b/firmware/target/arm/gigabeat/meg-fx/i2c-meg-fx.c | |||
@@ -90,7 +90,7 @@ static void i2c_delay(void) | |||
90 | /* about 30 cycles overhead + X * 7 */ | 90 | /* about 30 cycles overhead + X * 7 */ |
91 | /* 300MHz: 1000nS @3.36nS/cyc = 297cyc: X = 38*/ | 91 | /* 300MHz: 1000nS @3.36nS/cyc = 297cyc: X = 38*/ |
92 | /* 100MHz: 1000nS @10nS/cyc = 100cyc : X = 10 */ | 92 | /* 100MHz: 1000nS @10nS/cyc = 100cyc : X = 10 */ |
93 | for (_x = get_cpu_boost_counter() ? 38 : 10; _x; _x--) | 93 | for (_x = 38; _x; _x--) |
94 | { | 94 | { |
95 | /* burn CPU cycles */ | 95 | /* burn CPU cycles */ |
96 | /* gcc makes it an inc loop - check with objdump for asm timing */ | 96 | /* gcc makes it an inc loop - check with objdump for asm timing */ |
diff --git a/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c index d4e061a0c7..f9cb35f884 100644 --- a/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c +++ b/firmware/target/arm/gigabeat/meg-fx/sc606-meg-fx.c | |||
@@ -30,9 +30,9 @@ | |||
30 | /* cycles delayed = 30 + 7 * loops */ | 30 | /* cycles delayed = 30 + 7 * loops */ |
31 | /* 100MHz = 10nS per cycle: LO:1300nS=130:14 HI:600nS=60:9 */ | 31 | /* 100MHz = 10nS per cycle: LO:1300nS=130:14 HI:600nS=60:9 */ |
32 | /* 300MHz = 3.36nS per cycle: LO:1300nS=387:51 HI:600nS=179:21 */ | 32 | /* 300MHz = 3.36nS per cycle: LO:1300nS=387:51 HI:600nS=179:21 */ |
33 | #define DELAY_LO do{int x;for(x=get_cpu_boost_counter()?51:14;x;x--);} while (0) | 33 | #define DELAY_LO do{int x;for(x=51;x;x--);} while (0) |
34 | #define DELAY do{int x;for(x=get_cpu_boost_counter()?35:10;x;x--);} while (0) | 34 | #define DELAY do{int x;for(x=35;x;x--);} while (0) |
35 | #define DELAY_HI do{int x;for(x=get_cpu_boost_counter()?21: 9;x;x--);} while (0) | 35 | #define DELAY_HI do{int x;for(x=21;x;x--);} while (0) |
36 | 36 | ||
37 | 37 | ||
38 | 38 | ||