From 9858f5294bcbcb4b3aa899553951402df14dd784 Mon Sep 17 00:00:00 2001
From: "David A. Mellis" <d.mellis@arduino.cc>
Date: Fri, 8 May 2009 11:05:41 +0000
Subject: [PATCH] Adding ATmega328 bootloader for the Pro and Pro Mini running
 at 8 MHz (3.3V).  Uses the USART0 double speed mode, which according to
 Nathan from Sparkfun, is necessary to achieve reliable communication at 57600
 baud.

---
 bootloaders/atmega/ATmegaBOOT_168.c           |   8 ++
 .../ATmegaBOOT_168_atmega328_pro_8MHz.hex     | 124 ++++++++++++++++++
 bootloaders/atmega/Makefile                   |  15 +++
 3 files changed, 147 insertions(+)
 create mode 100644 bootloaders/atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex

diff --git a/bootloaders/atmega/ATmegaBOOT_168.c b/bootloaders/atmega/ATmegaBOOT_168.c
index 8ea1509..2b9fefa 100755
--- a/bootloaders/atmega/ATmegaBOOT_168.c
+++ b/bootloaders/atmega/ATmegaBOOT_168.c
@@ -370,8 +370,16 @@ int main(void)
 	UCSRA = 0x00;
 	UCSRB = _BV(TXEN)|_BV(RXEN);	
 #elif defined(__AVR_ATmega168__) || defined(__AVR_ATmega328P__)
+
+#ifdef DOUBLE_SPEED
+	UCSR0A = (1<<U2X0); //Double speed mode USART0
+	UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*8L)-1);
+	UBRR0H = (F_CPU/(BAUD_RATE*8L)-1) >> 8;
+#else
 	UBRR0L = (uint8_t)(F_CPU/(BAUD_RATE*16L)-1);
 	UBRR0H = (F_CPU/(BAUD_RATE*16L)-1) >> 8;
+#endif
+
 	UCSR0B = (1<<RXEN0) | (1<<TXEN0);
 	UCSR0C = (1<<UCSZ00) | (1<<UCSZ01);
 
diff --git a/bootloaders/atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex b/bootloaders/atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
new file mode 100644
index 0000000..9753e2e
--- /dev/null
+++ b/bootloaders/atmega/ATmegaBOOT_168_atmega328_pro_8MHz.hex
@@ -0,0 +1,124 @@
+:107800000C94343C0C94513C0C94513C0C94513CE1
+:107810000C94513C0C94513C0C94513C0C94513CB4
+:107820000C94513C0C94513C0C94513C0C94513CA4
+:107830000C94513C0C94513C0C94513C0C94513C94
+:107840000C94513C0C94513C0C94513C0C94513C84
+:107850000C94513C0C94513C0C94513C0C94513C74
+:107860000C94513C0C94513C11241FBECFEFD8E036
+:10787000DEBFCDBF11E0A0E0B1E0EAE8FFE702C063
+:1078800005900D92A230B107D9F712E0A2E0B1E065
+:1078900001C01D92AD30B107E1F70E942D3D0C945F
+:1078A000C33F0C94003C982F95959595959595958B
+:1078B000905D8F708A307CF0282F295A8091C0000B
+:1078C00085FFFCCF9093C6008091C00085FFFCCF60
+:1078D0002093C6000895282F205DF0CF982F809127
+:1078E000C00085FFFCCF9093C6000895EF92FF92F1
+:1078F0000F931F93EE24FF2487018091C00087FD22
+:1079000017C00894E11CF11C011D111D81E2E8164D
+:1079100081EAF80687E0080780E0180770F3E09135
+:107920000401F091050109958091C00087FFE9CF1E
+:107930008091C6001F910F91FF90EF9008950E94D3
+:10794000763C982F8091C00085FFFCCF9093C600B5
+:1079500091362CF490330CF09053892F089597555D
+:10796000892F08951F930E949F3C182F0E949F3CCF
+:107970001295107F810F1F9108951F93182F882350
+:1079800021F00E94763C1150E1F71F9108951F935A
+:10799000182F0E94763C803249F0809103018F5F5E
+:1079A000809303018530C1F01F9108958091C0003C
+:1079B00085FFFCCF84E18093C6008091C00085FFE5
+:1079C000FCCF1093C6008091C00085FFFCCF80E102
+:1079D0008093C6001F910895E0910401F091050184
+:1079E00009951F9108950E94763C803241F0809164
+:1079F00003018F5F80930301853081F008958091AA
+:107A0000C00085FFFCCF84E18093C6008091C00058
+:107A100085FFFCCF80E18093C6000895E0910401CA
+:107A2000F09105010995089548EC50E08823A1F0F4
+:107A30002D9A28EE33E0FA013197F1F721503040CA
+:107A4000D1F72D9828EE33E0FA013197F1F7215064
+:107A50003040D1F7815061F708953F924F925F9285
+:107A60006F927F928F929F92AF92BF92CF92DF924E
+:107A7000EF92FF920F931F93CF93DF93000082E06A
+:107A80008093C00080E18093C4001092C50088E11B
+:107A90008093C10086E08093C2005098589A259A3E
+:107AA00081E00E94143D24E1F22E9EE1E92E85E959
+:107AB000D82E0FE0C02E10E1B12EAA24A394B1E479
+:107AC0009B2EA6E58A2EF2E57F2EE0E26E2E79E46B
+:107AD000572E63E5462E50E5352E0E94763C8033C6
+:107AE000B1F18133B9F1803409F46FC0813409F404
+:107AF00076C0823409F485C0853409F488C08035A5
+:107B000031F1823521F1813511F1853509F485C0D6
+:107B1000863509F48DC0843609F496C0843709F49B
+:107B200003C1853709F472C1863709F466C08091B4
+:107B300003018F5F80930301853079F6E0910401A2
+:107B4000F091050109950E94763C803351F60E9420
+:107B5000F33CC3CF0E94763C803249F78091C0004D
+:107B600085FFFCCFF092C6008091C00085FFFCCF5E
+:107B70009092C6008091C00085FFFCCF8092C60025
+:107B80008091C00085FFFCCF7092C6008091C0003C
+:107B900085FFFCCF6092C6008091C00085FFFCCFBE
+:107BA0005092C6008091C00085FFFCCF4092C60075
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+:107C200006010E94763C809307010E94F33C55CFE9
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+:107CB00070910701660F771F7093070160930601AB
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+:107CD0009B01AD014E0F5F1FF999FECF32BD21BD53
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+:107D0000C00085FFFCCFF092C6008091C00085FFC7
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+:107D30000E94763C80930802809106019091070191
+:107D4000880F991F90930701809306010E94763C4B
+:107D5000853409F49AC080910C028E7F80930C02C6
+:107D60000E94763C803209F0B8CE8091C00085FF39
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+:107DB000C00085FFFCCF9093C6002F5F3F4FCB01E3
+:107DC0000196FA012A173B0780F4BC014F5F5F4F11
+:107DD000002351F3F999FECFF2BDE1BDF89A90B5B9
+:107DE0008091C00085FFFCCFE6CF709307016093C0
+:107DF00006018091C00085FDE5CE8091C00085FF21
+:107E0000F8CFE0CE81E00E94C73C67CE0E94763C6E
+:107E1000803209F08CCE8091C00085FFFCCFF092BB
+:107E2000C6008091C00085FFFCCFE092C600809123
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+:107EA0008A2180930B028091060190910701880F2F
+:107EB000991F90930701809306018091080280FF2B
+:107EC00009C08091080290910902019690930902DD
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+:107EF000103091F40091570001700130D9F303E084
+:107F000000935700E8950091570001700130D9F3B4
+:107F100001E100935700E8950990199000915700EE
+:107F200001700130D9F301E000935700E8951395F3
+:107F3000103498F011270091570001700130D9F3E7
+:107F400005E000935700E89500915700017001305B
+:107F5000D9F301E100935700E8953296029709F0B2
+:107F6000C7CF103011F00296E5CF11248091C000E8
+:107F700085FFC5CEC8CE8EE10E94C73CAECD85E957
+:0A7F80000E94C73CAACDF894FFCF81
+:027F8A00800075
+:040000030000780081
+:00000001FF
diff --git a/bootloaders/atmega/Makefile b/bootloaders/atmega/Makefile
index 6c6c215..0fd54db 100755
--- a/bootloaders/atmega/Makefile
+++ b/bootloaders/atmega/Makefile
@@ -166,6 +166,21 @@ atmega328_isp: LFUSE = FF
 atmega328_isp: EFUSE = 05
 atmega328_isp: isp
 
+atmega328_pro8: TARGET = atmega328_pro_8MHz
+atmega328_pro8: MCU_TARGET = atmega328p
+atmega328_pro8: CFLAGS += '-DMAX_TIME_COUNT=F_CPU>>4' '-DNUM_LED_FLASHES=1' -DBAUD_RATE=57600 -DDOUBLE_SPEED
+atmega328_pro8: AVR_FREQ = 8000000L 
+atmega328_pro8: LDSECTION  = --section-start=.text=0x7800
+atmega328_pro8: $(PROGRAM)_atmega328_pro_8MHz.hex
+
+atmega328_pro8_isp: atmega328_pro8
+atmega328_pro8_isp: TARGET = atmega328_pro_8MHz
+atmega328_pro8_isp: MCU_TARGET = atmega328p
+atmega328_pro8_isp: HFUSE = DA
+atmega328_pro8_isp: LFUSE = FF
+atmega328_pro8_isp: EFUSE = 05
+atmega328_pro8_isp: isp
+
 mega: TARGET = atmega1280
 mega: MCU_TARGET = atmega1280
 mega: CFLAGS += '-DMAX_TIME_COUNT=F_CPU>>4' '-DNUM_LED_FLASHES=0' -DBAUD_RATE=57600